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Shareholders' Equity (Tables) | 9 Months Ended
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Sep. 30, 2020
Equity [Abstract] |
Schedule of common stock reserved for future issuance | At September 30, 2020, we had reserved shares of common stock for future issuance under equity compensation plans as follows:
(in 000's) |  | Securities To Be Issued Upon Exercise Of Options |  | Securities To Be Issued Upon Release Of Restricted Stock and Performance Share Units |  | Number Of Remaining Securities Available For Future Issuance
2009 Equity Incentive Plan |  | 19 |  |  | — |  |  | — |
2011 Equity Incentive Plan |  | 1,387 |  |  | 5,810 |  |  | 3,057 |
DVS Sciences Inc. 2010 Equity Incentive Plan |  | 13 |  |  | — |  |  | — |
2017 Inducement Award Plan |  | 207 |  |  | 216 |  |  | — |
2017 Employee Stock Purchase Plan |  | — |  |  | — |  |  | 3,100 |
|  | 1,626 |  |  | 6,026 |  |  | 6,157 |
Total stock-based compensation expense recognized was as follows (in thousands):
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2020 |  | 2019 |  | 2020 |  | 2019
Restricted stock units, stock options and performance share units |  | $ | 4,114 |  |  | $ | 2,738 |  |  | $ | 9,558 |  |  | $ | 7,731 |
Employee stock purchase plan |  | 243 |  |  | 291 |  |  | 800 |  |  | 561 |
Total stock-based compensation |  | $ | 4,357 |  |  | $ | 3,029 |  |  | $ | 10,358 |  |  | $ | 8,292 |

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