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Stockholder's Equity (Tables)

3 Months Ended

Mar. 31, 2021

Share-based Payment Arrangement [Abstract]

Summary of Stock Option Activity

Activity of stock options under the 2005 Plan, 2011 Plan and 2014 Plan (collectively, the "Plans") is set forth below:

						Number of Shares						Weighted-Average Exercise Price
Balance at December 31, 2020						1,020,978						$	23.38
Exercised						(42,408)						15.70
Canceled/Forfeited						—						—
Balance at March 31, 2021						978,570						23.71

Summary of Unvested Restricted Stock and Restricted Stock Unit Activity

Activity of unvested restricted stock awards and restricted stock units under the Plans during the three months ended March 31, 2021 is set forth below: 

						Number of Shares						Weighted -Average Grant Date Fair Value
Unvested at December 31, 2020						369,629						$	163.03
Granted						53,080						255.00
Released/Vested - Restricted Stock/RSUs						(36,672)						140.42
Canceled/Forfeited						(4,182)						175.99
Unvested at March 31, 2021						381,855						177.84

Schedule of Stock-based Compensation Expense

The following table sets forth the stock-based compensation expense included in the Company’s condensed consolidated statements of operations for the three months ended March 31, 2021 and 2020 (in thousands):

						Three Months Ended March 31,
						2021						2020
Cost of revenue						$	798					$	648
Research and development						1,062						874
Sales, general and administrative						4,535						4,167
Total						$	6,395					$	5,689

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Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year.

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