Note 13 - Income Taxes - Reconciliation of the Amount of Income Taxes Computed at the Federal Statutory Rate to the Amount Reflected in Consolidated Statements of Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Tax provision at federal statutory income tax rate	$ (78)	$ 111	$ (720)
State income taxes benefit (expense), net of federal income tax effect	$ (49)	$ (17)	(125)
Decrease in valuation allowance for utilization of deferred tax assets			1,082
Reduction in valuation allowance			1,912
Stock based compensation	$ (108)	$ (199)	$ (201)
State rate adjustment	$ (4)	(41)
R&D credit		24
Other, net	$ (14)	30	$ 102
Income tax (expense) benefit	$ (253)	$ (92)	$ 2,050