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STOCKHOLDERS' EQUITY: - PDP Assumed Performance Plan and Qualified EPP (Details) $ in Thousands | 12 Months Ended
--- | ---
Mar. 31, 2020 USD ($) numberOfIncrement shares | Mar. 31, 2019 USD ($) shares | Mar. 31, 2018 USD ($) shares
Share-based compensation |  |  |
Number of increments | numberOfIncrement | 4 |  |
Other Accrued Liabilities, Current | $ 68,991 | $ 40,916 |
Employee Stock [Member] |  |  |
Share-based compensation |  |  |
Shares which remained available for future grants (in shares) | shares | 500,000 |  |
Stock Issued During Period, Shares, Employee Stock Purchase Plans | shares | 264,996 | 264,996 | 264,996
Share-based compensation expense | $ 500 | $ 400 | $ 200
Pacific Data Partners LLC |  |  |
Share-based compensation |  |  |
Annual payout, percentage | 90.00% |  |
Performance compensation plan, trading days | 20 days |  |
End of period annual payout, percentage | 10.00% |  |
Non-cash stock-based compensation expense | $ 37,800 |  |
Other Accrued Liabilities, Current | $ 16,300 |  |
Pacific Data Partners LLC | Time Vesting Restricted Stock Units |  |  |
Share-based compensation |  |  |
Debt conversion, converted instrument, rate | 100.00% |  |
Number of increments | numberOfIncrement | 3 |  |
Incremental compensation cost | $ 600 |  |
Pacific Data Partners LLC | Common Stock |  |  |
Share-based compensation |  |  |
Performance payout | $ 19,700 |  |
Deferred compensation arrangement, shares issued (in shares) | shares | 465,389 |  |
Deferred compensation arrangement, liability-classified portion, shares issued (in shares) | shares | 393,306 |  |

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