Quarterly report pursuant to Section 13 or 15(d)

Stock Options and Warrants (Details Textual)

v3.8.0.1
Stock Options and Warrants (Details Textual) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Dec. 01, 2016
Nov. 01, 2016
Sep. 01, 2016
Aug. 24, 2016
Dec. 31, 2015
Dec. 30, 2015
Nov. 02, 2015
May 07, 2015
May 01, 2015
Apr. 23, 2015
Dec. 15, 2014
Dec. 01, 2014
Apr. 27, 2017
Jan. 30, 2017
Dec. 31, 2016
Mar. 31, 2016
Feb. 02, 2016
Nov. 26, 2014
Sep. 22, 2014
Mar. 31, 2017
Jan. 30, 2017
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Sep. 19, 2017
Aug. 22, 2016
Sep. 03, 2015
Jul. 15, 2015
Jul. 01, 2013
Stock Options and Warrants (Textual)                                                          
Warrant exercise price                                           $ 3.51              
Common stock, shares authorized                             200,000,000             200,000,000   200,000,000     200,000,000    
Stock-based compensation                                           $ 788,000 $ 1,027,000            
Warrants issued to purchase common stock                       8,462     187,500                            
Warrants valued using Black-Scholes Option pricing model                                       $ 73,000                  
Options granted contract term                                           7 years 9 months 18 days              
Debt discount recorded upon issuance of warrants                             $ 305,000             $ 206,000            
Options outstanding                             273,550             670,999   273,550          
Options exercisable, number of shares                                           361,828              
Outstanding warrants exercisable                                           5,684,603              
Weighted average exercise price                                           $ 8.87              
Description of warrants       Warrant exercise price was reduced from $5.00 to $4.00 per share                                                  
Stock Option [Member]                                                          
Stock Options and Warrants (Textual)                                                          
Description of vesting right                                           The options granted have a contract term ranging between three and ten years. Options granted typically vest over a four-year period, with 25% vesting after one year and the remainder ratably over the remaining three years.              
Options vesting period                                           4 years              
Options vesting percentage                                           25.00%              
Aggregate of common stock shares                                           440,000              
Total unrecognized deferred stock compensation                                           $ 1,200,000              
Weighted-average vesting periods                                           3 years 7 months 6 days              
2014 Services Warrants - April [Member]                                                          
Stock Options and Warrants (Textual)                                                          
Warrant exercise price [1]                                           $ 39.00              
Exercise price per share                                           $ 11.50              
Outstanding warrants exercisable [1]                                           13,657              
2014 Convertible Notes Warrants [Member]                                                          
Stock Options and Warrants (Textual)                                                          
Warrant exercise price [2]                                           $ 25.00              
Outstanding warrants exercisable [2]                                           16,000              
2014 Services Warrants - September [Member]                                                          
Stock Options and Warrants (Textual)                                                          
Warrant exercise price [3]                                           $ 25.00              
Exercise price per share                                           $ 39              
Outstanding warrants exercisable [3]                                           26,500              
2017 Senior Notes Warrants [Member]                                                          
Stock Options and Warrants (Textual)                                                          
Warrant exercise price                                                 $ 1.50        
Warrants outstanding                                                 $ 128,000        
Outstanding warrants exercisable                                                 222,222        
2013 Equity Incentive Plan [Member]                                                          
Stock Options and Warrants (Textual)                                                          
Maximum number of common shares authorized to purchase                                           446,000             420,000
Options outstanding                                           224,999              
Options exercisable, number of shares                                           196,341              
2015 Omnibus Incentive Plan [Member]                                                          
Stock Options and Warrants (Textual)                                                          
Maximum number of common shares authorized to purchase                                           83,465       600,000      
Common stock, shares authorized                                                       300,000  
Term of stock option and stock appreciation right                                           The maximum term of each stock option and stock appreciation right (SAR) is 10 years.              
Options outstanding                                                        
Options exercisable, number of shares                                           177,487              
Minimum [Member]                                                          
Stock Options and Warrants (Textual)                                                          
Options granted contract term                                           3 years              
Maximum [Member]                                                          
Stock Options and Warrants (Textual)                                                          
Options granted contract term                                           10 years              
Restricted Stock [Member]                                                          
Stock Options and Warrants (Textual)                                                          
Description of vesting right                                           The remaining unvested restricted shares vest 33% per year on March 31, 2018, 2019, and 2020.              
Restricted stock issued                                           210,000              
Warrants [Member]                                                          
Stock Options and Warrants (Textual)                                                          
Warrant exercise price                             $ 3.77             $ 3.51   $ 3.77          
Warrants issued to purchase common stock                                         250,000                
Exercise price per share                         $ 3.00                                
Warrant term                                         5 years                
Deferred financing charges                         $ 30,000                                
Description of warrants     The Company issued warrants to purchase up to 250,000 shares of the Company's common stock between November 1, 2016 and January 30, 2017, each with a five-year term. The September 1, 2016 and November 1, 2016 warrants were issued with a $4.00 per share exercise price, subsequently amended to a $3.00 per share exercise price. The exercise price of the warrants was reduced to $4.00 per share. Concurrent with the issuance of the 2016 Senior Notes the exercise price of the warrants was further reduced to $3.00 per share. The warrants initially provided that if, prior to the earlier of June 30, 2016 or thirty days after the date on which the December PIPE shares and underlying warrants are registered for resale, the Company issued common share derivative securities at a price per share less than $5.00 per share, the Company was obligated to reduce the exercise price of the December PIPE warrants to a price per share equal to the newly issued shares or derivative common stock securities.                                                
Warrants [Member] | Black Scholes Option Pricing Model [Member]                                                          
Stock Options and Warrants (Textual)                                                          
Warrants issued to purchase common stock                         41,000                                
Exercise price per share                         $ 3.00                                
Deferred financing charges                         $ 26,000                                
Warrants [Member] | Minimum [Member]                                                          
Stock Options and Warrants (Textual)                                                          
Exercise price per share       $ 4.00                                                  
Reduction in warrants exercise price       3.00                                                  
Warrants [Member] | Maximum [Member]                                                          
Stock Options and Warrants (Textual)                                                          
Exercise price per share       12.50                                                  
Reduction in warrants exercise price       $ 3.00                                                  
Warrant 1 [Member]                                                          
Stock Options and Warrants (Textual)                                                          
Weighted average remaining life of warrants                                           3 years 11 months 12 days              
Warrants issued to purchase common stock 62,500 62,500 124,999   312,500 50,000 74,000 83,518 5,514 136,267 19,232 19,232   62,500   500,000 50,000 6,500 26,500     62,500   62,500          
Warrant issued value                                   $ 43,000 $ 296,000                    
Exercise price per share $ 3.00 $ 3.00 $ 4.00   $ 5.00 $ 12.50 $ 15.00 $ 12.50 $ 12.50 $ 12.50 $ 25.00 $ 39.00   $ 3.00   $ 5.00 $ 12.50 $ 25.00 $ 25.00         $ 3.00          
Warrants valued using Black-Scholes Option pricing model     $ 271,000       $ 246,000 $ 2,139,000 $ 56,000 $ 2,139,000   $ 246,000       $ 1,497,000 $ 148,000                        
Reduction in warrants exercise price                               $ 5.00                          
Warrant term     5 years                                                    
Convertible Unsecured Notes Warrant [Member]                                                          
Stock Options and Warrants (Textual)                                                          
Exercise price per share   $ 4 $ 4                                     $ 3              
Reclassification of warrants previously recorded as derivative liabilities to paid in capital                                           $ 30,000              
Convertible Unsecured Notes Warrant [Member] | 2014 Services Warrants - September [Member]                                                          
Stock Options and Warrants (Textual)                                                          
Stock-based compensation                                     $ 6,000                    
Warrant issued value                                     $ 131,000                    
Exercise price per share                                     $ 25.00                    
[1] The 2014 Services Warrants April were issued for fees incurred in conjunction with the issuance of convertible notes in 2014. The warrants were valued on the issuance date at $11.50 per share in conjunction with the valuation approach used for the initial valuation of the warrants issued in connection with the convertible notes issued in 2014.
[2] The 2014 Services Warrants-September were issued to a consultant in exchange for advisory services with no readily available fair value. The warrants were originally issued at an exercise price of $39.00 per share and had a one-time price reset provision to the exercise price of the warrants issued to investors in the convertible notes offering in April 2014 if the exercise price of such convertible notes warrants changed prior to September 30, 2014. On September 22, 2014, the exercise price was changed to $25.00 per share. There are no further exercise price changes for this warrant series. The warrants were valued using the Black-Scholes option pricing model at $131,000 on the issuance date with an additional $6,000 recorded to expense on September 22, 2014 to reflect the change in fair value resulting from the exercise price change.
[3] On September 22, 2014, the Company issued warrants to purchase up to 26,500 shares of common stock with an exercise price of $25.00 per share in conjunction with placement agent services for the Company's September 2014 private equity placement. The warrants were valued using the Black-Scholes option pricing model at $296,000 on the issuance date.