Annual report pursuant to Section 13 and 15(d)

Convertible Senior Notes Payable (Details Textual)

v3.8.0.1
Convertible Senior Notes Payable (Details Textual) - USD ($)
3 Months Ended 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Line of Credit Facility [Line Items]        
Purchase of warrants 6,084,603   6,084,603  
Allocated value of warrants issued with Senior Notes       $ 4,133,000
Allocated value of conversion feature associated with Senior Notes       3,495,000
Conversion of common shares       111,000
Senior notes, Issued [Member]        
Line of Credit Facility [Line Items]        
Principal amount $ 60,000   $ 60,000  
Conversion of common shares, shares     24,000  
Unamortized debt discount     $ 53,000  
2016 Senior Notes [Member]        
Line of Credit Facility [Line Items]        
Original issue discount $ 930,000   $ 930,000  
Convertible price per share $ 2.50   $ 2.50  
Debt discount $ 8,558,000   $ 8,558,000  
Offering costs $ 479,000   $ 479,000  
Bear interest rate 10.00%   10.00%  
Exercise price     $ 2.50  
Trading day, Description     (i) the Weighted Average Price (as defined in the Senior Notes) of the Company's common stock for each trading day during a twenty trading day period equals or exceeds $5.00 (as adjusted for any stock dividend, stock split, stock combination, reclassification or similar transaction) and no Equity Conditions Failure (as defined in the Senior Notes) has occurred.  
Beneficially own, Description     The Senior Notes also contain a blocker provision that prevents the Company from effecting a conversion in the event that the holder, together with certain affiliated parties, would beneficially own in excess of either 4.99% or 9.99%, with such threshold determined by the holder prior to issuance, of the shares of the Company's common stock outstanding immediately after giving effect to such conversion.  
Percentage of conversion amount     115.00%  
Debt instrument redemption, Description     The Company may redeem all or any portion of the then outstanding principal and accrued and unpaid interest with respect to such principal, at 100% of such aggregate amount; provided, however, that the aggregate Conversion Amount to be redeemed pursuant to all Senior Notes must be at least $500,000, or such lesser amount as is then outstanding. The portion of the Senior Note(s) to be redeemed shall be redeemed at a price equal to the greater of (i) 110% of the Conversion Amount of the Senior Note being redeems and (ii) the product of (A) the Conversion Amount being redeemed and (B) the quotient determined by dividing (I) the greatest Weighted Average Price (as defined in the Senior Notes) of the shares of the Company's common stock during the period beginning on the date immediately preceding the date of the notice of such redemption by the Company and ending on the date on which the redemption by the Company occurs by (II) the lowest Conversion Price (as defined in the Senior Notes) in effect during such period.  
2016 Senior Notes [Member] | Warrants [Member]        
Line of Credit Facility [Line Items]        
Face amount $ 9,302,000   $ 9,302,000  
Purchase of warrants 3,720,839   3,720,839  
Shares price $ 3.00   $ 3.00  
Issued warrants term     5 years  
Option pricing     $ 6,003,000  
2015 Senior Notes [Member]        
Line of Credit Facility [Line Items]        
Convertible price per share $ 2.50   $ 2.50  
Placement agent fees     $ 298,000  
Legal and professional fees     181,000  
2015 Senior Notes [Member] | Warrants [Member]        
Line of Credit Facility [Line Items]        
Face amount $ 9,302,000   $ 9,302,000  
Purchase of warrants 3,720,839   3,720,839  
Shares price $ 3.00   $ 3.00  
Issued warrants term     5 years  
Option pricing     $ 6,003,000  
2017 Senior Notes [Member] | Warrants [Member]        
Line of Credit Facility [Line Items]        
Original issue discount $ 156,000   156,000  
Debt discount 461,000   461,000  
Offering costs 51,000   $ 51,000  
Convertible senior secured notes [Member]        
Line of Credit Facility [Line Items]        
Percentage of conversion amount     115.00%  
Debt instrument redemption, Description     Further, at any time from and after January 1, 2018 and provided that the Company has not received either (i) initial deposits for at least eight 2 MW Power Oxidizer units or (ii) firm purchase orders totaling not less than $3,500,000 and initial payment collections of at least $1,600,000, in each case during the period commencing on the issuance date of the 2016 Senior Notes and ending on December 31, 2017, the holder of the Senior Note may require the Company to redeem all or any portion of its Senior Note at a price equal to 100% of the Conversion Amount being redeemed.  
Convertible senior secured notes [Member] | 2016 Senior Notes [Member] | Senior notes, Issued [Member]        
Line of Credit Facility [Line Items]        
Principal amount   $ 111,000   111,000
Face amount   3,747,000   3,747,000
Original issue discount   375,000   $ 375,000
Cash proceeds from secured note   $ 3,372,000    
Shares price   $ 2.50   $ 2.50
Allocated value of warrants issued with Senior Notes       $ 4,133,000
Allocated value of conversion feature associated with Senior Notes       $ 3,495,000
Conversion of common shares, shares       44,444
Convertible senior secured notes [Member] | 2015 Senior Notes [Member] | Senior notes one, Issued [Member]        
Line of Credit Facility [Line Items]        
Principal amount   $ 5,000,000   $ 5,000,000
Face amount   5,556,000   5,556,000
Original issue discount   556,000   556,000
Allocated value of warrants issued with Senior Notes       4,133,000
Allocated value of conversion feature associated with Senior Notes       3,495,000
Convertible senior secured notes [Member] | 2015 Senior Notes [Member] | Senior notes two, Issued [Member]        
Line of Credit Facility [Line Items]        
Principal amount   $ 111,000   $ 111,000
Shares price   $ 2.50   $ 2.50
Conversion of common shares, shares       44,444
Convertible senior secured notes [Member] | 2017 Senior Notes [Member] | Warrants [Member]        
Line of Credit Facility [Line Items]        
Face amount 1,556,000   $ 1,556,000  
Original issue discount 156,000   $ 156,000  
Cash proceeds from secured note $ 1,400,000      
Purchase of warrants 622,222   622,222  
Issued warrants term 5 years      
Option pricing $ 305,000      
Debt discount $ 305,000   $ 305,000  
Exercise price $ 1.50