Note 15 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Reduction in Tax Reserves that was Overstated [Member]
Tax Adjustments, Settlements, and Unusual Provisions	$ (893)		$ (893)
Reversal of Overstated Deferred Tax Asset [Member]
Tax Adjustments, Settlements, and Unusual Provisions	2,300		2,300
Tax Adjustments, Settlements, and Unusual Provisions	1,400		1,400
Income Tax Expense (Benefit)	$ 3,888	$ 767	$ 8,055	$ 5,551
Effective Income Tax Rate Reconciliation, Percent	63.00%	10.40%	48.50%	25.80%