Note 1 - Description of Business and Summary of Accounting Policies - Reconciliation of Adjustments to the Previously Reported Consolidated Statements of Cash Flows (Details) - USD ($)	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Scenario, Previously Reported [Member]
Net income (loss)	$ (195,000)	$ 4,209,000
Deferred income taxes	199,000	(2,095,000)
Accounts receivable	419,000	(1,382,000)
Inventories	(1,185,000)	(108,000)
Accrued expenses	(98,000)	(480,000)
Restatement Adjustment [Member]
Net income (loss)	(225,000)	(45,000)
Deferred income taxes	(131,000)	(26,000)
Accounts receivable	713,000	123,000
Inventories	(325,000)	(49,000)
Accrued expenses	(32,000)	(3,000)
Net income (loss)	(420,000)	4,164,000
Deferred income taxes	68,000	(2,121,000)
Accounts receivable	1,132,000	(1,259,000)
Inventories	(1,510,000)	(157,000)
Accrued expenses	$ (130,000)	$ (483,000)