v3.20.4

Stockholders' equity (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2020
Stockholders' equity |
Schedule of amount of shares of common stock reserved | ​
​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
​ |  | 2020 |  | 2019
​ | ​ | (in thousands)
Outstanding stock options under the 2001 Plan | ​ | — | ​ | 7
Outstanding stock options under the 2011 Plan |  | 109 |  | 228
Outstanding RSUs under the 2011 Plan |  | 951 |  | 633
Shares available for grant under the 2011 Plan |  | 1,382 |  | 2,478
Total |  | 2,442 |  | 3,346

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