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CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (UNAUDITED) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Development revenues:    
Government contracts and other $ 118 $ 737
Operating expenses:    
Research and development 941 1,426
Sales and marketing 110 114
General and administrative 1,508 1,363
Total operating expenses 2,559 2,903
Operating loss (2,441) (2,166)
Other income (expense):    
Interest income 36 7
Interest expense (349) (515)
Change in fair value of warrants 1,667 210
Total other income (expense) 1,354 (298)
Loss from continuing operations (1,087) (2,464)
Loss from discontinued operations   (686)
Net loss $ (1,087) $ (3,150)
Basic and diluted net loss per share attributable to common stockholders - continuing operations $ (0.28) $ (6.98)
Basic and diluted net loss per share attributable to common stockholders - discontinued operations   (1.94)
Net loss per share, basis and diluted $ (0.28) $ (8.92)
Basic and diluted weighted average shares used in calculating net loss per share attributable to common stockholders 3,880,588 353,142
Comprehensive loss:    
Net loss $ (1,087) $ (3,150)
Other comprehensive loss – foreign currency translation adjustments   (140)
Comprehensive loss $ (1,087) $ (3,290)