INCOME TAXES: - Reconciliation of Income Tax Benefit from Continuing Operations and Valuation Allowance Change (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Reconciliation of income tax expense computed using the U.S. federal statutory income tax rate of 35% of earnings before income taxes to the actual provision for income taxes for continuing operations
U.S. federal statutory income tax rate (as a percent)		35.00%	35.00%	35.00%
Computed expected tax benefit	$ 3,025	$ (7,098)	$ (14,472)
Increase (reduction) in income taxes resulting from:
State income taxes, net of federal benefit	(1,586)	(1,796)	(441)
Research and other tax credits	(2,285)	(4,027)	(6,369)
Nondeductible expenses	1,156	661	590
Acxiom Impact disposition	(4,502)
Share-based compensation	3,308	1,857	2,276
Non-U.S. subsidiaries taxed at other than 35%	614	2,468	4,354
Adjustment to valuation allowances	2,896	(3,585)	(776)
Acquisitions costs	478		217
Foreign Income Exclusion	473
Other, net	957	(112)	(184)
Total	$ 4,534	(11,632)	$ (14,805)
Foreign jurisdiction
Valuation allowance
Valuation allowances (released)/increased		$ (3,600)