v3.20.4

Stockholders' equity (Details) $ in Thousands | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Oct. 31, 2018 | Dec. 31, 2020 USD ($) shares | Dec. 31, 2019 shares
Stockholders' equity |  |  |
Common stock authorized (in shares) |  | 100,000,000 | 100,000,000
Shares of Common Stock reserved |  |  |
Total (in shares) |  | 2,442,000 | 3,346,000
Convertible Notes |  |  |
Shares of Common Stock reserved |  |  |
Conversion ratio | 0.0236323 | 0.0236323 |
Debt conversion converted amount | $ |  | $ 1 |
Convertible Notes | If Convertible Notes were converted |  |  |
Shares of Common Stock reserved |  |  |
Shares issued upon conversion of convertible shares |  | 4,756,000 |
Stock options |  |  |
Shares of Common Stock reserved |  |  |
Outstanding stock options (in shares) |  | 109,000 | 235,000
RSUs |  |  |
Shares of Common Stock reserved |  |  |
Outstanding RSUs (in shares) |  | 951,000 | 633,000
2001 Plan |  |  |
Shares of Common Stock reserved |  |  |
Outstanding stock options (in shares) |  | 0 |
2001 Plan | Stock options |  |  |
Shares of Common Stock reserved |  |  |
Outstanding stock options (in shares) |  |  | 7,000
2011 Plan |  |  |
Shares of Common Stock reserved |  |  |
Number of shares available for grant (in shares) |  | 1,382,000 | 2,478,000
2011 Plan | Stock options |  |  |
Shares of Common Stock reserved |  |  |
Outstanding stock options (in shares) |  | 109,000 | 228,000
2011 Plan | RSUs |  |  |
Shares of Common Stock reserved |  |  |
Outstanding RSUs (in shares) |  | 951,000 | 633,000

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