Note 13 - Income Taxes - Open Tax Years and Jurisdictions That the Company Used In Its Evaluation of Tax Positions (Details)	12 Months Ended
	Mar. 31, 2015
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member] | Earliest Tax Year [Member]
Open Tax year	2012
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member] | Latest Tax Year [Member]
Open Tax year	2015
State and Local Jurisdiction [Member] | Hawaii Department of Taxation [Member] | Earliest Tax Year [Member]
Open Tax year	2012
State and Local Jurisdiction [Member] | Hawaii Department of Taxation [Member] | Latest Tax Year [Member]
Open Tax year	2015
State and Local Jurisdiction [Member] | California Franchise Tax Board [Member] | Earliest Tax Year [Member]
Open Tax year	2011
State and Local Jurisdiction [Member] | California Franchise Tax Board [Member] | Latest Tax Year [Member]
Open Tax year	2015