Note 12 - Retirement Plans (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2015 Scenario, Forecast [Member] Maximum [Member]
Note 12 - Retirement Plans (Details) [Line Items]
Defined Contribution Plan, Employers Matching Contribution, Annual Vesting Percentage	100.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	4.00%
Defined Contribution Plan Employer Contribution Vesting Period	4 years
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 771	$ 789	$ 690
Defined Benefit Plan, Contributions by Employer				125
Defined Benefit Plan, Benefits Paid	$ 58	$ 56