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Condensed Consolidated Statements of Stockholders' Deficit - USD ($)
$ in Thousands
Total
Common Stock Issued [Member]
Treasury Stock [Member]
Additional Paid in Capital [Member]
Accumulated Deficit [Member]
Accumulated Other Comprehensive loss [Member]
Balance at Dec. 31, 2014 $ 18,145 $ 6 $ (51) $ 246,513 $ (246,513) $ 20
Balance (in shares) at Dec. 31, 2014   608,775 (110) 64,683    
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Compensation expense for issuance of stock options 349     $ 349    
Compensation expense for issuance of restricted stock 308     308    
Compensation expense for issuance of restricted stock (in shares)   35,991        
Sale of common stock, net of expenses 8,479 $ 8   8,471    
Sale of common stock, net of expenses (in shares)   738,125        
Warrants exercised 176     176    
Warrants Exercised (in shares)   13,457        
Fair value of warrants issued classified as liability (4,247)     (4,247)    
Fair value of warrants exercised 123     123    
Net loss (14,704)       (14,704)  
Total comprehensive loss (28)         (28)
Balance at Dec. 31, 2015 8,601 $ 14 $ (51) 269,863 (261,217) (8)
Balance (in shares) at Dec. 31, 2015   1,396,348 (110)      
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Compensation expense for issuance of stock options 161     161    
Compensation expense for issuance of restricted stock 266     266    
Compensation expense for issuance of restricted stock (in shares)   2,180        
Sale of common stock, net of expenses 1,011 $ 4   1,007    
Sale of common stock, net of expenses (in shares)   428,067        
Issuance of common stock for payments made in shares on convertible note payable 649 $ 18   631    
Issuance of common stock for payments made in shares on convertible note payable (in shares)   1,805,299        
Fair value of Beneficial conversion feature of convertible note 4,435     4,435    
Warrants exercised 1,372 $ 5   1,367    
Warrants Exercised (in shares)   499,633        
Fair value of warrants issued classified as liability (707)     (707)    
Fair value of warrants exercised 726     726    
Net loss (17,971)       (17,971)  
Total comprehensive loss (33)         (33)
Balance (Scenario, Previously Reported [Member]) at Dec. 31, 2016   $ 41   277,749    
Balance at Dec. 31, 2016 (1,490)   $ (51) 277,790 (279,188) (41)
Balance (in shares) (Scenario, Previously Reported [Member]) at Dec. 31, 2016   4,131,527 (110)      
Balance (in shares) at Dec. 31, 2016   11,805 (1)      
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Compensation expense for issuance of stock options 48     48    
Compensation expense for issuance of restricted stock 84     84    
Compensation expense for issuance of restricted stock (in shares)   261        
Issuance of common stock for payments made in shares on convertible note payable 25,866 $ 14   25,852    
Issuance of common stock for payments made in shares on convertible note payable (in shares)   1,413,790        
Series B preferred stock dividend (526)       (526)  
Warrants exercised 15     15    
Warrants Exercised (in shares)   297        
Fair value of warrants exercised 19     19    
Net loss (25,873)       (25,873)  
Total comprehensive loss 7         7
Balance at Sep. 30, 2017 $ (1,850) $ 14 $ (51) $ 303,808 $ (305,587) $ (34)
Balance (in shares) at Sep. 30, 2017   1,426,153 (1)