Note 4 - Stock Option Plans (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	6 Months Ended
	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	3,018,347	3,018,000	1,457,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Weighted Average Grant Date Fair Value (in Dollars per share)		$ 0.06	$ 0.36
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period		88,000
Share-based Compensation (in Dollars)		$ 49	$ 138