Note 5 Other Assets (Narratives) (Details) (USD $)	12 Months Ended		0 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 12, 2014
Available-for-sale Securities, Other Disclosure Items [Abstract]
Other than Temporary Impairment Losses, Investments, Total	$ 1,900,000	$ 7,000
Available-for-sale Securities, Change in Net Unrealized Holding Gain (Loss), Net of Tax	7,000	325,000
Available-for-sale Securities, Gross Realized Gains	30,000
Available-for-sale Securities, Change in Net Unrealized Holding Gain (Loss) before Taxes	32,000
Schedule of Equity Method Investments [Line Items]
Long-term Equity Method Investments	11,041,000	5,921,000
ATEC [Member]
Schedule of Equity Method Investments [Line Items]
Equity Investment Effective Date			Dec. 12, 2014
Equity Method Investment, Ownership Percentage	24.30%		24.30%
Long-term Equity Method Investments			5,900,000
Equity Method Investment, Description of Principal Activities			ATEC is a supplier located in the Philippines that provides assembly and test services
Income (Loss) from Equity Method Investments	(140,000)
Equity Method Investment, Aggregate Cost			$ 14,000