Note 16 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Reversal of Overstated Deferred Tax Asset [Member]
Tax Adjustments, Settlements, and Unusual Provisions	$ 2,300
Reduction in Tax Reserves that was Overstated [Member]
Tax Adjustments, Settlements, and Unusual Provisions	(893)
Domestic Tax Authority [Member]
Operating Loss Carryforwards	27,800
Foreign Tax Authority [Member]
Operating Loss Carryforwards	17,100
Tax Adjustments, Settlements, and Unusual Provisions	1,400
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	(436)	$ 32
Operating Loss Carryforwards, Valuation Allowance	13,200
Unrecognized Tax Benefits	6,946	6,952	$ 6,978	$ 6,736
Unrecognized Tax Benefits, Period Increase (Decrease)	(6)
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations	772	3,070	$ 941
Unrecognized Tax Benefits, Increase Resulting from Prior Period and Current Period Tax Positions	766
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	1,500
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	4,100	$ 4,100
Unrecognized Tax Benefits, Increase (Decrease) in Income Tax Penalties and Interest Accrued	488
Undistributed Earnings of Foreign Subsidiaries	$ 124,900