Note 15 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Tax Expense (Benefit)	$ 2,860	$ 2,505	$ 5,112	$ 4,167
Effective Income Tax Rate Reconciliation, Percent	42.10%	43.40%	42.40%	40.00%