Note 10 - Income Taxes (Details) - Provisions for Income Taxes (USD $) In Thousands, unless otherwise specified	12 Months Ended
Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Current tax provision
Federal	$ 4,031	$ 4,440	$ 4,233
State	106	280	437
	4,137	4,720	4,670
Deferred tax provision:
Federal	(19)	(180)	(237)
State	(15)	(12)	(21)
	(34)	(192)	(258)
	$ 4,103	$ 4,528	$ 4,412

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations.