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STOCK-BASED COMPENSATION (Tables) | 3 Months Ended
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Jun. 30, 2021
Share-based Payment Arrangement [Abstract] |
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs | The following table presents stock-based compensation expense:
|  |  |  | Three Months Ended June 30,
|  |  |  |  |  | 2021 |  | 2020
Cost of service revenue |  |  |  |  |  | $ | 1,968 |  |  | $ | 1,814 |
Cost of other revenue |  |  |  |  |  | 1,071 |  |  | 787 |
Research and development |  |  |  |  |  | 8,698 |  |  | 6,545 |
Sales and marketing |  |  |  |  |  | 14,326 |  |  | 5,739 |
General and administrative |  |  |  |  |  | 10,524 |  |  | 7,894 |
Total |  |  |  |  |  | $ | 36,587 |  |  | $ | 22,779 |
Schedule of Stock Option Activity | The following table presents stock option activity (shares in thousands):
|  | Number of Shares |  | Weighted Average Exercise Price Per Share |  | Weighted Average Remaining Contractual Term |  | Aggregate Intrinsic Value
Outstanding at March 31, 2021 |  | 1,813 |  |  | $ | 9.46 |  |  | 2.86 years |  | $ | 41,673 |
Granted |  | — |  |  | — |  |  |  |  |
Exercised |  | (391) |  |  | 9.04 |  |  |  |  |
Canceled/Forfeited |  | (9) |  |  | 21.85 |  |  |  |  |
Outstanding at June 30, 2021 |  | 1,413 |  |  | $ | 9.50 |  |  | 2.61 years |  | $ | 25,806 |
Vested and expected to vest at June 30, 2021 |  | 1,411 |  |  | $ | 9.48 |  |  | 2.60 years |  | $ | 25,788 |
Exercisable at June 30, 2021 |  | 1,373 |  |  | $ | 9.19 |  |  | 2.48 years |  | $ | 25,498 |
Schedule of Share-based Compensation Arrangements by Share-based Payment Award | The following table presents RSU activity (shares in thousands):
|  | Number of Shares |  | Weighted Average Grant Date Fair Value |  | Weighted Average Remaining Contractual Term |  | Aggregate Intrinsic Value
Outstanding at March 31, 2021 |  | 8,646 |  |  | $ | 19.27 |  |  | 1.85 years |  | $ | 280,467 |
Granted |  | 3,466 |  |  | 26.36 |  |  |  |  |
Vested and released |  | (969) |  |  | 20.07 |  |  |  |  |
Forfeited |  | (317) |  |  | 19.71 |  |  |  |  |
Outstanding at June 30, 2021 |  | 10,826 |  |  | $ | 21.45 |  |  | 2.05 years |  | $ | 300,524 |
The following table presents PSU activity (shares in thousands):
|  | Number of Shares |  | Weighted Average Grant Date Fair Value |  | Weighted Average Remaining Contractual Term |  | Aggregate Intrinsic Value
Outstanding at March 31, 2021 |  | 1,576 |  |  | $ | 27.33 |  |  | 1.24 years |  | $ | 51,116 |
Granted |  | 465 |  |  | 27.92 |  |  |  |  |
Granted for performance achievement 1 |  | 20 |  |  | 27.92 |  |  |  |  |
Vested and released |  | (206) |  |  | 16.12 |  |  |  |  |
Forfeited |  | (198) |  |  | 24.61 |  |  |  |  |
Outstanding at June 30, 2021 |  | 1,657 |  |  | $ | 30.56 |  |  | 1.43 years |  | $ | 46,012 |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions | The following table presents the estimated fair value on the date of grant of each of the look-back features and the assumptions used in the Black-Scholes pricing model:
Fair value of look-back options | $4.64 | - | $8.24
Valuation assumptions: |  |  |
Expected volatility | 58.7%
Risk-free interest rates | 0.06 | % | - | 0.07%
Expected terms (in years) | 0.38 | - | 1.21
Dividend rate | —%

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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=122041274&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 + Details
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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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