Note 10 - Subsequent Event (Detail) (Subsequent Event [Member], USD $) In Millions, unless otherwise specified	6 Months Ended	0 Months Ended
Oct. 09, 2013 Minimum [Member]	Apr. 12, 2013
Entity Public Float (in Dollars)	$ 5	$ 5
Compliance Period	10 days	180 days

State aggregate market value of voting and non-voting common equity held by non-affiliates computed by reference to price at which the common equity was last sold, or average bid and asked price of such common equity, as of the last business day of registrant's most recently completed second fiscal quarter. The public float should be reported on the cover page of the registrants form 10K.

No definition available.

Name:	dei_EntityPublicFloat
Namespace Prefix:	dei_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant