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Shareholders' Equity (Tables) | 3 Months Ended
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Mar. 31, 2022
Equity [Abstract] |
Schedule of Common Stock Reserved for Future Issuance | As of March 31, 2022, we had reserved shares of common stock for future issuance under equity compensation plans as follows:
In thousands |  | Securities To Be Issued Upon Exercise Of Options |  | Securities To Be Issued Upon Release Of Restricted Stock and Performance Share Units at Maximum |  | Number Of Remaining Securities Available For Future Issuance
2011 Equity Incentive Plan |  | 1,376 |  |  | 7,259 |  |  | 3,561 |
DVS Sciences Inc. 2010 Equity Incentive Plan |  | 6 |  |  | — |  |  | — |
2017 Inducement Award Plan |  | 159 |  |  | 57 |  |  | — |
2017 Employee Stock Purchase Plan |  | — |  |  | — |  |  | 2,633 |
|  | 1,541 |  |  | 7,316 |  |  | 6,194 |
Total stock-based compensation expense recognized was as follows (in thousands):
|  | Three Months Ended March 31, |  |  |  |
|  | 2022 |  | 2021 |  |  |  |  |  |  |  |
Restricted stock units, stock options and performance share units |  | $ | 3,942 |  |  | $ | 3,473 |  |  |  |  |  |  |  |  |
Employee stock purchase plan |  | 100 |  |  | 204 |  |  |  |  |  |  |  |  |
Total stock-based compensation |  | $ | 4,042 |  |  | $ | 3,677 |  |  |  |  |  |  |  |  |

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