INCOME TAXES: - Carryforwards (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Carryforwards
Valuation allowance	$ 46,602	$ 49,922
No expiration dates
Carryforwards
Tax credit carryforwards	5,100
State jurisdiction
Carryforwards
Net operating loss carryforwards	70,900
Tax credit carryforwards	17,500
Tax credit carryforwards that will be credited to additional paid-in capital when realized	1,500
State jurisdiction | Operating loss and tax credit carryforwards
Carryforwards
Valuation allowance	6,000
Foreign jurisdiction
Carryforwards
Net operating loss carryforwards	130,900
Foreign jurisdiction | No expiration dates
Carryforwards
Net operating loss carryforwards	130,000
Foreign jurisdiction | Non-US with history of losses
Carryforwards
Valuation allowances against loss carryforwards	40,600
Foreign jurisdiction | Non-US with historical profits and forecasted continuing profits
Carryforwards
Valuation allowance	0
U.S. Federal
Carryforwards
Net operating loss carryforwards	5,600
Tax credit carryforwards	3,500
Tax credit carryforwards that will be credited to additional paid-in capital when realized	$ 900