Note 14 - Income Taxes (Details Textual) - USD ($)	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Deferred Tax Assets, Valuation Allowance	$ 3,722,000	$ 3,564,000
Tax Credit Carryforward, Amount	28,000
Operating Loss Carryforwards	$ 11,762,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	34.00%	34.00%	34.00%
State and Local Jurisdiction [Member] | California Franchise Tax Board [Member]
Operating Loss Carryforwards	$ 1,040,000
State and Local Jurisdiction [Member] | Hawaii Department of Taxation [Member]
Operating Loss Carryforwards	6,289,000
Alternative Minimum Tax [Member]
Tax Credit Carryforward, Amount	$ 120,000