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CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (UNAUDITED) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Development revenues:        
Government contracts and other $ 302 $ 899 $ 1,039 $ 1,816
Total development revenues 302 899 1,039 1,816
Operating expenses:        
Research and development 1,289 1,267 2,715 2,661
Sales and marketing 97 185 211 478
General and administrative 875 1,293 2,237 3,302
Total operating expenses 2,261 2,745 5,163 6,441
Operating loss (1,959) (1,846) (4,124) (4,625)
Other income (expense):        
Interest income 7 5 14 19
Interest expense (597) (444) (1,111) (866)
Change in fair value of warrants 282   492 0
Total other expense (308) (439) (605) (847)
Loss from continuing operations (2,267) (2,285) (4,729) (5,472)
Loss from discontinued operations (6,880) (1,374) (7,568) (2,596)
Net loss $ (9,147) $ (3,659) $ (12,297) $ (8,068)
Basic and diluted net loss per share attributable to common stockholders from continuing operations $ (5.12) $ (18.53) $ (11.89) $ (44.91)
Basic and diluted net loss per share attributable to common stockholders from discontinued operations (15.55) (11.14) (19.02) (21.31)
Net loss per share, basic and diluted $ (20.67) $ (29.67) $ (30.91) $ (66.22)
Basic and diluted weighted average shares used in calculating net loss per share attributable to common stockholders 442,512 123,330 397,827 121,843
Comprehensive loss:        
Net loss $ (9,147) $ (3,659) $ (12,297) $ (8,068)
Other comprehensive (loss) income – foreign currency translation adjustments   131   (150)
Comprehensive loss $ (9,147) $ (3,528) $ (12,297) $ (8,218)