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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)

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