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Note 11 - Income Taxes - Provisions for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Current tax provision
Federal	$ 2,282	$ 3,666	$ 4,186
State	510	627	1,135
Foreign	849	658	212
	3,641	4,951	5,533
Deferred tax provision:
Federal	(126)	(189)	252
State	(32)	(138)	51
Foreign	(370)	(238)	(72)
	(528)	(565)	231
	$ 3,113	$ 4,386	$ 5,764

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