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Consolidated Statements of Operations and Comprehensive Loss - USD ($)
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Operating expenses    
Research and development $ 8,128,000 $ 6,817,000
General and administrative 6,056,000 7,243,000
Goodwill impairment 1,867,000 0
Total operating expenses 16,051,000 14,060,000
Loss from operations (16,051,000) (14,060,000)
Other income (expense), net 40,000 (5,000)
Net loss and other comprehensive loss $ (16,011,000) $ (14,065,000)
Net loss per share, basic and diluted $ (1.36) $ (1.56)
Weighted-average common shares outstanding, basic and diluted 11,799,468 9,005,352