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Unaudited Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Revenue:        
Total operating revenue $ 109,000 $ 131,000 $ 264,000 $ 470,000
Cost of sales:        
Cost of product sales $ 86,000 $ 22,000 $ 169,000 $ 187,000
Type of Cost, Good or Service [Extensible List] Product Sales Product Sales Product Sales Product Sales
Gross profit $ 23,000 $ 109,000 $ 95,000 $ 283,000
Operating expenses:        
Research and development 1,489,000 1,327,000 4,182,000 3,755,000
Selling, general and administrative 2,859,000 2,370,000 9,800,000 7,625,000
Amortization expense 48,000 72,000 153,000 287,000
Total operating expenses 4,396,000 3,769,000 14,135,000 11,667,000
Operating loss (4,373,000) (3,660,000) (14,040,000) (11,384,000)
Other (expense) income:        
Other income       63,000
Change in fair value of derivative financial instruments   1,000   4,000
Foreign exchange (loss) gain (314,000) 182,000 10,000 (278,000)
Total other (expense) income (314,000) 183,000 10,000 (211,000)
Net loss (4,687,000) (3,477,000) (14,030,000) (11,595,000)
Other comprehensive income (loss):        
Foreign currency translation adjustments 287,000 (172,000) (26,000) 209,000
Comprehensive loss $ (4,400,000) $ (3,649,000) $ (14,056,000) $ (11,386,000)
Net loss per share        
Basic $ (2.01) $ (2.70) $ (6.29) $ (10.36)
Diluted $ (2.01) $ (2.70) $ (6.29) $ (10.36)
Weighted average shares outstanding        
Basic 2,326,893 1,289,657 2,229,422 1,119,639
Diluted 2,326,893 1,289,657 2,229,422 1,119,639
Product Sales        
Revenue:        
Total operating revenue $ 102,000 $ 124,000 $ 242,000 $ 441,000
Fee Revenue        
Revenue:        
Total operating revenue 0 0 0 9,000
License Revenue        
Revenue:        
Total operating revenue $ 7,000 $ 7,000 $ 22,000 $ 20,000