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Stock-Based Compensation | 6 Months Ended
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Sep. 30, 2021
Share-based Payment Arrangement [Abstract] |
Stock-Based Compensation | Stock-Based Compensation Equity Plan Activity The following table summarizes stock option activity:
|  | Number of Shares |  | Weighted-Average Exercise Price (per share) |  | Weighted-Average Remaining Contractual Life (in years) |  | Aggregate Intrinsic Value (in thousands)
Options outstanding as of March 31, 2021 |  | 8,146,445 |  |  | $ | 4.01 |  |  | 6.86 |  | $ | 622,249 |
Granted |  | 630,989 |  |  | 72.31 |  |  |  |  |
Forfeited / Cancelled |  | (214,884) |  |  | 8.41 |  |  |  |  |
Exercised |  | (658,549) |  |  | 3.27 |  |  |  |  |
Options outstanding as of September 30, 2021 |  | 7,904,001 |  |  | $ | 9.40 |  |  | 6.65 |  | $ | 473,227 |
Vested and expected to vest (net of estimated forfeitures) at September 30, 2021 |  | 7,784,152 |  |  | $ | 9.04 |  |  | 6.61 |  | $ | 468,633 |
Exercisable as of September 30, 2021 |  | 5,642,551 |  |  | $ | 3.58 |  |  | 5.83 |  | $ | 368,277 |
At September 30, 2021 and 2020, total unrecognized stock-based compensation expense related to unvested stock options, net of estimated forfeitures, was $28,197 and $8,956, respectively, with expected remaining weighted-average recognition periods of 2.48 years and 2.25 years, respectively. The following table summarizes restricted stock unit ("RSU") and restricted stock award ("RSA") activity:
|  | Number of Shares |  | Weighted-Average Grant Date Fair Value
Unvested restricted shares outstanding as of March 31, 2021 |  | 333,544 |  |  | $ | 4.55 |
Granted |  | 332,061 |  |  | 45.62 |
Vested |  | (298,350) |  |  | 3.69 |
Cancelled |  | (3,526) |  |  | 13.88 |
Unvested restricted shares outstanding as of September 30, 2021 |  | 363,729 |  |  | $ | 42.65 |
At September 30, 2021 and 2020, total unrecognized stock-based compensation expense related to RSUs and RSAs was $12,152 and $1,463, respectively, with expected remaining weighted-average recognition periods of 2.32 years and 2.01 years, respectively. Stock-Based Compensation Expense As of September 30, 2021, 11,274,655 shares of common stock were available for issuance as future awards under the Company's equity incentive plans. Stock-based compensation expense for the three and six months ended September 30, 2021, was $5,926 and $9,631, respectively, and was recorded within general and administrative expenses on the condensed consolidated statements of operations and comprehensive income. Stock-based compensation expense for the three and six months ended September 30, 2020, was $2,515 and $4,126, respectively, and was recorded within general and administrative expenses on the condensed consolidated statements of operations and comprehensive income.

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- Definition The entire disclosure for share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 + Details
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