Note 3 - Concentration of Credit Risk (Detail) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Cash, Uninsured Amount	$ 9,864,000	$ 4,397,000

The amount of cash as of the balance sheet date that is not insured by the Federal Deposit Insurance Corporation.

No definition available.

Name:	us-gaap_CashUninsuredAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant