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Consolidated Statements of Operations - USD ($)
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Condensed Consolidated Statements of Operations    
Sales $ 0 $ 0
Cost of goods sold - warranty adjustment (see note 5) 279,000 1,000
Gross loss (279,000) (1,000)
Operating expenses:    
Research and development, net of grants 2,029,000 3,056,000
General and administrative 4,624,000 5,526,000
Total operating expenses 6,653,000 8,582,000
Loss from operations (6,932,000) (8,583,000)
Other income:    
Other Income 44,000  
Interest income 2,000 101,000
Net loss (6,886,000) (8,482,000)
Net loss attributed to non-controlling interest 2,000 3,000
Net loss attributed to common stockholders $ (6,884,000) $ (8,479,000)
Net loss per share - basic and fully diluted $ (0.25) $ (0.32)
Weighted average number of shares outstanding - basic and fully diluted 27,837,095 26,701,042