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Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Cost of goods sold $ (227) $ (188) $ (541) $ (434)
Gross profit 295 278 906 705
Operating expenses:        
Research and development expenses 2,955 3,260 10,159 8,457
Selling, general and administrative expenses 4,036 1,998 10,621 6,571
Total operating expenses 6,991 5,258 20,780 15,028
Operating loss (6,696) (4,980) (19,874) (14,323)
Change in fair value of the warrant liability, net       (2,832)
Interest expense, net (420) (44) (501) (132)
Other income (loss) (9) 33 73 160
Net loss (7,125) (4,991) (20,302) (17,127)
Deemed dividend for triggering of warrant down round feature       (55)
Net loss attributable to common stockholders (7,125) (4,991) (20,302) (17,182)
Net loss (7,125) (4,991) (20,302) (17,127)
Other comprehensive (loss) income:        
Foreign currency translation adjustments 51 (103) 84 (39)
Total other comprehensive loss $ (7,074) $ (5,094) $ (20,218) $ (17,166)
Common share data:        
Basic loss per common share $ (0.94) $ (1.16) $ (2.93) $ (7.75)
Diluted loss per common share $ (0.94) $ (1.16) $ (2.93) $ (7.75)
Weighted average number of basic shares outstanding 7,587,643 4,288,593 6,923,541 2,217,611
Weighted average number of diluted shares outstanding 7,587,643 4,288,593 6,923,541 2,217,611
Product Revenue [Member]        
Revenue $ 395 $ 340 $ 1,054 $ 778
Other Revenue [Member]        
Revenue $ 127 $ 126 $ 393 $ 361