Annual report pursuant to Section 13 and 15(d)

Prepaid Expenses and Other Current Assets (Details)

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Prepaid Expenses and Other Current Assets (Details) - USD ($)
Dec. 31, 2017
Dec. 31, 2016
Prepaid Expenses and Other Current Assets [Abstract]    
Prepaid rent $ 10,000 $ 52,000
Prepaid offering costs 194,000
Prepaid insurance 19,000 43,000
Prepaid other 63,000 96,000
Prepaid professional fees 32,000 1,000
Current portion-deferred financing fees for letter of credit 15,000 110,000
Total $ 333,000 $ 302,000