INTANGIBLE ASSETS: - Amounts allocated to intangible assets from acquisitions (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Mar. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	$ 167,980	$ 161,853
Accumulated amortization	(136,444)	(122,123)
Total finite-lived intangible assets, net	31,536	39,730
Developed technology, gross (Software)
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	84,195	78,547
Accumulated amortization	(65,943)	(60,424)
Total finite-lived intangible assets, net	18,252	18,123
Customer relationship/Trade name, gross
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	43,985	43,506
Accumulated amortization	(40,337)	(37,510)
Total finite-lived intangible assets, net	3,648	5,996
Publisher/Data Supply Relationships
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	39,800	39,800
Accumulated amortization	(30,164)	(24,189)
Total finite-lived intangible assets, net	$ 9,636	$ 15,611