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ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: - Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Mar. 31, 2018 | Apr. 01, 2019
Property, Plant and Equipment [Line Items] |  |  |  |
Unbiled amounts included in accounts receivable | $ 5,000 | $ 2,500 |  |
CARES Act, bad debt expense | 3,500 |  |  |
Recognition of capitalized contract cost | 5,300 | 4,300 |  |
Right-of-use asset (see Note 2) | 17,830 | 0 |  |
Advertising expense | $ 9,800 | $ 8,200 | $ 8,300 |
Revenue Benchmark [Member] | Customer Concentration Risk [Member] |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Concentration risk, percentage | 35.00% |  |  |
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Interpublic Group of Companies |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Concentration risk, percentage | 14.00% |  |  |
Accounting Standards Update 2016-02 |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Right-of-use asset (see Note 2) |  |  |  | $ 22,900
Short-term lease liabilities (See Note 2) |  |  |  | 8,400
Long-term lease liabilities |  |  |  | 17,900
Deferred rent |  |  |  | $ (3,400)
Minimum | Incentive Stock Option |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Exercise price as a percentage of the per-share market value of the Company's shares at the date of grant | 100.00% |  |  |
Minimum | Leasehold improvements |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Estimated useful life | 5 years |  |  |
Minimum | Data processing equipment |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Estimated useful life | 2 years |  |  |
Minimum | Office furniture and other equipment |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Estimated useful life | 3 years |  |  |
Maximum | Incentive Stock Option |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Duration of stock options granted | 10 years |  |  |
Maximum | Nonqualified Options |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Exercise price as a percentage of the per-share market value of the Company's shares at the date of grant | 100.00% |  |  |
Duration of stock options granted | 10 years |  |  |
Maximum | Leasehold improvements |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Estimated useful life | 7 years |  |  |
Maximum | Data processing equipment |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Estimated useful life | 5 years |  |  |
Maximum | Office furniture and other equipment |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Estimated useful life | 7 years |  |  |

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