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Consolidated Statements of Stockholders' Equity (Deficit) - USD ($)
$ in Thousands
Total
Common Stock Issued [Member]
In Treasury [Member]
Additional Paid-in Capital [Member]
 [1]
Accumulated Deficit [Member]
Accumulated Other Comprehensive (loss) income [Member]
Balance at Dec. 31, 2014 $ 18,145 $ 6 [1] $ (51) [1] $ 264,683 $ (246,513) $ 20
Balance (in shares) at Dec. 31, 2014 [1]   608,775 (110)      
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Compensation expense for issuance of stock options 349 $ 0 [1] $ 0 [1] 349 0 0
Compensation expense for issuance of restricted stock 308 $ 0 [1] $ 0 [1] 308 0 0
Compensation expense for issuance of restricted stock (in shares) [1]   35,991 0      
Sale of common stock, net of expenses 8,479 $ 8 [1] $ 0 [1] 8,471 0 0
Sale of common stock, net of expenses (in shares) [1]   738,125 0      
Exercise of warrants 176 $ 0 [1] $ 0 [1] 176 0 0
Exercise of warrants (in shares) [1]   13,457 0      
Fair value of warrants issued classified as liability (4,247) $ 0 [1] $ 0 [1] (4,247) 0 0
Fair value of warrants exercised 123 0 [1] 0 [1] 123 0 0
Net loss (14,704) 0 [1] 0 [1] 0 (14,704) 0
Foreign currency translation (28) 0 [1] 0 [1] 0 0 (28)
Balance at Dec. 31, 2015 8,601 $ 14 [1] $ (51) [1] 269,863 (261,217) (8)
Balance (in shares) at Dec. 31, 2015 [1]   1,396,348 (110)      
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Compensation expense for issuance of stock options 161 $ 0 [1] $ 0 [1] 161 0 0
Compensation expense for issuance of restricted stock 266 $ 0 [1] $ 0 [1] 266 0 0
Compensation expense for issuance of restricted stock (in shares) [1]   2,180 0      
Sale of common stock, net of expenses 1,011 $ 4 [1] $ 0 [1] 1,007 0 0
Sale of common stock, net of expenses (in shares) [1]   428,067 0      
Issuance of common stock for payments made in shares on convertible notes payable 649 $ 18 [1] $ 0 [1] 631 0 0
Issuance of common stock for payments made in shares on convertible notes payable (in shares) [1]   1,805,299 0      
Fair value of Beneficial conversion feature of convertible note 4,435 $ 0 [1] $ 0 [1] 4,435 0 0
Exercise of warrants 1,372 $ 5 [1] $ 0 [1] 1,367 0 0
Exercise of warrants (in shares) [1]   499,633 0      
Fair value of warrants issued classified as liability (707) $ 0 [1] $ 0 [1] (707) 0 0
Fair value of warrants exercised 726 0 [1] 0 [1] 726 0 0
Net loss (17,971) 0 [1] 0 [1] 0 (17,971) 0
Foreign currency translation (33) 0 [1] 0 [1] 0 0 (33)
Balance at Dec. 31, 2016 $ (1,490) $ 41 [1] $ (51) [1] $ 277,749 $ (279,188) $ (41)
Balance (in shares) at Dec. 31, 2016 [1]   4,131,527 (110)      
[1] reflects a one-for-sixteen (1:16) reverse stock split effected on July 21, 2016