INTANGIBLE ASSETS: Amounts Allocated to Intangible Assets from Acquisitions (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Mar. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	$ 167,300	$ 167,436
Accumulated amortization	(149,906)	(140,718)
Total finite-lived intangible assets, net	17,394	26,718
Developed technology, gross
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	84,033	84,146
Accumulated amortization	(71,760)	(67,980)
Total finite-lived intangible assets, net	12,273	16,166
Customer relationship/trade name, gross
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	43,467	43,490
Accumulated amortization	(42,007)	(40,582)
Total finite-lived intangible assets, net	1,460	2,908
Publisher/data supply relationships, gross
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	39,800	39,800
Accumulated amortization	(36,139)	(32,156)
Total finite-lived intangible assets, net	$ 3,661	$ 7,644