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STOCK-BASED COMPENSATION: - Performance-based restricted stock units (Details) - USD ($) $ in Thousands | 6 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2020 | Jul. 16, 2020 | Mar. 31, 2020
Share-based compensation |  |  |
Business combination, contingent consideration, liability | $ 0 |  | $ 6,185
Acuity Data |  |  |
Share-based compensation |  |  |
Business combination, contingent consideration arrangements, range of outcomes, value, high |  | $ 5,100 |
Business combination, contingent consideration, liability | 700 |  |
Acuity Data | Accrued Liabilities |  |  |
Share-based compensation |  |  |
Business combination, contingent consideration, liability | $ 700 |  |
Restricted stock units | Performance stock |  |  |
Share-based compensation |  |  |
Granted (in shares) | 246,524 |  |
Aggregate fair value of restricted stock units granted | $ 10,700 |  |
Vesting in period (in shares) | 121,587 |  |
Forfeited in period (in shares) | 32,647 |  |
Outstanding at the end of the period (in shares) | 675,799 |  | 545,446
The total fair value of performance-based restricted stock units | $ 6,100 |  |
Restricted stock units | Performance Shares Vesting Total Shareholder Return |  |  |
Share-based compensation |  |  |
Granted (in shares) | 73,950 |  |
Aggregate fair value of restricted stock units granted | $ 4,200 |  |
Restricted stock units | Performance Shares Vesting Total Shareholder Return | Minimum |  |  |
Share-based compensation |  |  |
Award vesting rights percentage | 0.00% |  |
Restricted stock units | Performance Shares Vesting Total Shareholder Return | Maximum |  |  |
Share-based compensation |  |  |
Award vesting rights percentage | 200.00% |  |
Restricted stock units | Performance Shares Vesting Under The Second Plan |  |  |
Share-based compensation |  |  |
Granted (in shares) | 172,574 |  |
Aggregate fair value of restricted stock units granted | $ 6,500 |  |
Award vesting rights percentage | 50.00% |  |
Restricted stock units | Performance Shares Vesting Under The Second Plan | Minimum |  |  |
Share-based compensation |  |  |
Award vesting rights percentage | 0.00% |  |
Restricted stock units | Performance Shares Vesting Under The Second Plan | Maximum |  |  |
Share-based compensation |  |  |
Award vesting rights percentage | 200.00% |  |
Restricted stock units | Performance Shares Vesting In Three Equal Annual Increments |  |  |
Share-based compensation |  |  |
Vesting in period (in shares) | 59,480 |  |
Forfeited in period (in shares) | 38,063 |  |
Restricted stock units | Vesting Based on Relevant Performance Period Over Two Periods at March 31 2020 |  |  |
Share-based compensation |  |  |
Award vesting rights percentage | 164.00% |  |
Forfeited in period (in shares) | 97,543 |  |
Restricted stock units | Performance Shares Vesting Over Two Periods Ending September 30, 2021 |  |  |
Share-based compensation |  |  |
Granted (in shares) | 313,771 |  |
Award vesting rights percentage | 57.00% |  |
Forfeited in period (in shares) | 178,146 |  |
Outstanding at the end of the period (in shares) | 441,816 |  |
Restricted stock units | Performance Shares Vesting One-Year Anniversary Of Attainment |  |  |
Share-based compensation |  |  |
Award vesting rights percentage | 50.00% |  |
Vesting period | 1 year |  |
Restricted stock units | 2020 Performance Shares That Will Vest Immediately [Member] |  |  |
Share-based compensation |  |  |
Award vesting rights percentage | 33.00% |  |
Restricted stock units | 2020 Performance Shares That Vest In Equal Increments In First Quarters Of Fiscal Years 2022 And 2023 |  |  |
Share-based compensation |  |  |
Award vesting rights percentage | 67.00% |  |
Restricted stock units | 2019 Performance Shares That Will Vest Immediately |  |  |
Share-based compensation |  |  |
Award vesting rights percentage | 50.00% |  |
Restricted stock units | 2019 Performance Shares That Will Vest In The Second Quarter Of Fiscal Year 2022 |  |  |
Share-based compensation |  |  |
Award vesting rights percentage | 50.00% |  |

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