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v3.20.4

Consolidated Statements of Shareholders' Equity (Deficit) - USD ($) shares in Thousands, $ in Thousands | Common stock | Additional paid-in capital | Subscriptions receivable | Accumulated deficit | Total
--- | --- | --- | --- | --- | ---
Beginning balances at Dec. 31, 2018 | $ 100 | $ 550,133 | $ 0 | $ (546,116) | $ 4,117
Beginning balances, shares at Dec. 31, 2018 | 100,105 |  |  |  |
Share-based compensation expense | $ 1 | 1,613 | 0 | 0 | $ 1,614
Share-based compensation expense, shares | 822 |  |  |  |
Exercise of options, shares |  |  |  |  | 0
Sales of common stock | $ 25 | 16,750 | 0 | 0 | $ 16,775
Sales of common stock, shares | 24,876 |  |  |  |
Net loss | $ 0 | 0 | 0 | (26,483) | (26,483)
Ending balances at Dec. 31, 2019 | $ 126 | 568,496 | 0 | (572,599) | (3,977)
Ending balances, shares at Dec. 31, 2019 | 125,803 |  |  |  |
Share-based compensation expense | $ 0 | 1,252 | 0 | 0 | 1,252
Share-based compensation expense, shares | 201 |  |  |  |
Exercise of options | $ 1 | 999 | 0 | 0 | $ 1,000
Exercise of options, shares | 693 |  |  |  | 693
Sales of common stock | $ 26 | 30,477 | (6,135) | 0 | $ 24,368
Sales of common stock, shares | 26,229 |  |  |  |
Net loss | $ 0 | 0 | 0 | (13,634) | (13,634)
Ending balances at Dec. 31, 2020 | $ 153 | $ 601,224 | $ (6,135) | $ (586,233) | $ 9,009
Ending balances, shares at Dec. 31, 2020 | 152,926 |  |  |  |

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