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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Revenues $ 167 $ 133 $ 471 $ 658
Operating expenses:        
Research and development 5,546 5,917 14,106 15,219
Selling, general and administrative 3,954 4,983 12,676 15,504
Total operating expenses 9,500 10,900 26,782 30,723
Operating loss (9,333) (10,767) (26,311) (30,065)
Interest Expense 0 (3,474) 0 (5,610)
Other income (expense) 78 (35) 127 (161)
Loss from continuing operations before income taxes (9,255) (14,276) (26,184) (35,836)
Income tax expense 0 0 0 0
Loss from continuing operations (9,255) (14,276) (26,184) (35,836)
(Loss) income from discontinued operations, net of income taxes (204) (7,009) 12,919 (25,923)
Net loss $ (9,459) $ (21,285) $ (13,265) $ (61,759)
Loss per share from continuing operations, basic (in dollars per share) $ (0.16) $ (0.27) $ (0.46) $ (0.71)
Loss per share from continuing operations, diluted (in dollars per share) (0.16) (0.27) (0.46) (0.71)
Income (Loss) per share from discontinuing operations, diluted (in dollars per share) 0 (0.14) 0.23 (0.51)
Income (Loss) per share from discontinuing operations, basic (in dollars per share) 0 (0.14) 0.23 (0.51)
Loss per share diluted (in dollars per share) (0.16) (0.41) (0.23) (1.22)
Loss per share basic (in dollars per share) $ (0.16) $ (0.41) $ (0.23) $ (1.22)
Weighted average shares outstanding - basic (in shares) 57,930 52,028 57,117 50,776
Weighted average shares outstanding - diluted (in shares) 57,930 52,028 57,117 50,776
Royalty revenues        
Revenues $ 167 $ 133 $ 471 $ 658