Note 3 - Equipment and Leasehold Improvements, Net (Details Textual) - USD ($)	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Capital Leased Assets, Gross	$ 86,000
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation	0
Gain (Loss) on Disposition of Assets	(96,000)	$ (46,000)	$ (46,000)
Depreciation, Depletion and Amortization	1,243,000	1,086,000	847,000
Interest Costs Capitalized	$ 228,000	$ 199,000	$ 54,000