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Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Cost of goods sold $ (172) $ (233) $ (440) $ (600)
Gross profit 208 591 623 1,784
Operating expenses:        
Selling, general and administrative 4,002 2,279 9,204 7,286
Research and development 1,778 4,106 6,789 13,886
Total operating expenses 5,780 6,385 15,993 21,172
Operating loss (5,572) (5,794) (15,370) (19,388)
Change in fair value of the warrant liability, net 434 1,198 451 18,407
Loss on debt extinguishment   (1,123)   (1,123)
Loss on issuance of financial instrument (1,714)   (1,721) (2,826)
Interest expense (671) (3,151) (4,735) (3,402)
Other income (expense) 4 (10) 4 (21)
Net (loss) income (7,519) (8,880) (21,371) (8,353)
Other comprehensive (loss) income:        
Foreign currency translation adjustments 89 105 39 63
Total other comprehensive (loss) income $ (7,430) $ (8,775) $ (21,332) $ (8,290)
Common share data:        
Basic (loss) income per common share [1] $ (0.41) $ (0.25) $ (1.32) $ (0.60)
Diluted loss per common share [1] $ (1.41) $ (0.25) $ (2.45) $ (0.64)
Weighted average number of basic shares outstanding [1] 18,277,807 35,859,866 16,166,307 13,888,577
Weighted average number of diluted shares outstanding [1] 18,277,807 35,859,866 16,166,307 13,888,587
Product Revenue [Member]        
Revenue $ 216 $ 824 $ 528 $ 2,384
Other Revenue [Member]        
Revenue $ 164   $ 535  
[1] reflects a one-for-five hundred (1:500) reverse stock split effected on May 2, 2018.