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STOCK-BASED COMPENSATION (Tables) | 6 Months Ended
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Sep. 30, 2019
Share-based Payment Arrangement [Abstract] |
Schedule of Stock Option Expense and Activity | The following tables summarize information pertaining to the stock-based compensation expense from stock options and stock awards (in thousands, except weighted-average grant-date fair value and recognition period):
|  | Three Months Ended September 30, |  | Six Months Ended September 30,
|  | 2019 |  | 2018 |  | 2019 |  | 2018
Cost of service revenue |  | $ | 1,939 |  |  | $ | 1,379 |  |  | $ | 3,670 |  |  | $ | 2,405 |
Research and development |  | 4,217 |  |  | 2,823 |  |  | 8,081 |  |  | 5,017 |
Sales and marketing |  | 5,340 |  |  | 2,206 |  |  | 9,261 |  |  | 4,604 |
General and administrative |  | 5,895 |  |  | 3,721 |  |  | 9,976 |  |  | 7,014 |
Total |  | $ | 17,391 |  |  | $ | 10,129 |  |  | $ | 30,988 |  |  | $ | 19,040 |
|  | Six Months Ended September 30,
|  | 2019 |  | 2018
Stock options outstanding at the beginning of the period: |  | 3,114 |  |  | 3,998 |
Options granted |  | — |  |  | 195 |
Options exercised |  | (287 | ) |  | (574 | )
Options canceled and forfeited |  | (39 | ) |  | (97 | )
Options outstanding at the end of the period: |  | 2,788 |  |  | 3,522 |
Weighted-average fair value of grants during the period |  | $ | — |  |  | $ | 8.47 |
Total intrinsic value of options exercised during the period |  | $ | 3,726 |  |  | $ | 8,525 |
Weighted-average remaining recognition period at period-end (in years) |  | 2.32 |  |  | 2.52 |
Stock awards outstanding at the beginning of the period: |  | 7,820 |  |  | 5,939 |
Stock awards granted |  | 5,123 |  |  | 2,112 |
Stock awards vested |  | (1,945 | ) |  | (1,720 | )
Stock awards canceled and forfeited |  | (663 | ) |  | (433 | )
Stock awards outstanding at the end of the period: |  | 10,335 |  |  | 5,898 |
Weighted-average fair value of grants during the period |  | $ | 22.35 |  |  | $ | 22.01 |
Weighted-average remaining recognition period at period-end (in years) |  | 2.28 |  |  | 2.44 |
Total unrecognized compensation expense at period-end |  | $ | 129,136 |  |  | $ | 79,121 |

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- Definition Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, 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 (e) -URI http://asc.fasb.org/extlink&oid=116856206&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 (c)(2) -URI http://asc.fasb.org/extlink&oid=116856206&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 (d) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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