INCOME TAXES: - Reconciliation of deferred tax assets/liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017
Deferred tax assets:
Accrued expenses	$ 6,681	$ 9,517
Deferred revenue	491	1,837
Net operating loss carryforwards	51,068	50,414
Stock-based compensation	10,884	19,854
Nonqualified deferred compensation	3,217	4,672
Capital loss carryforward	2,099	3,414
Tax credit carryforwards	13,427	10,403
Other	234	(791)
Total deferred tax assets	88,101	99,320
Less valuation allowance	(49,719)	(47,074)
Net deferred tax assets	38,382	52,246
Deferred tax liabilities:
Prepaid expenses	(4,111)	(1,192)
Capitalized software costs	(7,343)	(11,582)
Property and equipment	(4,837)	(9,800)
Intangible assets	(42,281)	(77,785)
Accrued expenses	(7,828)	0
Total deferred tax liabilities	(66,400)	(100,359)
Net deferred tax liabilities	$ (28,018)	$ (48,113)