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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Dec. 31, 2015
Current assets      
Cash and cash equivalents $ 2,495 $ 4,409 $ 12,607
Restricted cash 8,362 27,287  
Accounts receivables, net 298 403 277
Inventories 1,164 660 757
Prepaid expenses and other current assets 385 698 960
Deferred financing costs 529 699  
Total current assets 13,233 34,156 14,601
Property, plant and equipment, net 1,253 1,083 1,132
Total assets 14,486 35,239 15,733
Current liabilities      
Accounts payable 1,891 594 284
Accrued expenses 3,755 3,407 2,243
Series C preferred shares 494 0  
Convertible notes payable, net of debt discount 9,736 13,343  
Warrant liability 16 18,751 3,785
Total current liabilities 15,892 36,095 6,312
Deferred revenue 0 30  
Other non-current liabilities 444 604 820
Total liabilities 16,336 36,729 7,132
Commitments and Contingencies
Stockholders' Equity (Deficit)      
Preferred stock 0 0  
Common stock [1] 14 0 14
Additional paid-in capital 303,808 277,790 269,863
Accumulated deficit (305,587) (279,188) (261,217)
Treasury stock [1] (51) (51) (51)
Accumulated other comprehensive income (34) (41) (8)
Total stockholders' deficit (1,850) (1,490) 8,601
Total liabilities and stockholders' deficit $ 14,486 35,239 $ 15,733
Scenario, Previously Reported [Member]      
Stockholders' Equity (Deficit)      
Common stock   41  
Additional paid-in capital   $ 277,749  
[1] reflects a one-for-sixteen (1:16) reverse stock split effected on July 21, 2016 and a one-for-three hundred and fifty (1:350) reverse stock split effected on November 6, 2017