INCOME TAXES: (Details 3) (USD $)	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Operating loss carryforwards
Valuation allowance	$ 50,598,000	$ 43,436,000
Valuation allowances against loss carryforwards	42,600,000
Changes in the total gross unrecognized tax benefit liabilities, including accrued interest
Balance at beginning of period	2,457,000	3,646,000	3,109,000
Additions based on tax positions related to the current year	4,339,000	902,000	342,000
Additions due to acquisition	2,887,000
Reduction due to expiration of statute of limitations	(181,000)	(3,037,000)
Adjustments to tax positions taken in prior years	209,000	946,000	195,000
Balance at end of period included in other liabilities	9,711,000	2,457,000	3,646,000
Interest and penalties related to unrecognized tax benefits
Interest expense and penalties	100,000
Accrued interest and penalties	300,000
U.S. federal
Operating loss carryforwards
Net operating loss carryforwards, subject to expiration	26,600,000
State jurisdiction
Operating loss carryforwards
Net operating loss carryforwards, subject to expiration	105,000,000
Tax credit carryforwards	12,100,000
Tax credit carryforwards, not subject to expiration	2,600,000
State jurisdiction | Operating loss and tax credit carryforwards
Operating loss carryforwards
Valuation allowance	8,000,000
State jurisdiction | Additional paid-in Capital
Operating loss carryforwards
Tax credit carryforwards	2,000,000
Foreign jurisdiction
Operating loss carryforwards
Net operating loss carryforwards	129,800,000
Net operating loss carryforwards, not subject to expiration	$ 126,800,000