Note 12 - Income Taxes (Detail) - Unrecognized Tax Benefits (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Balance	$ 308,000	$ 176,000
Increase to prior year tax positions	19,000	132,000
Increase to current year tax positions	0	0
Expiration of the statute of limitations for the assessment of taxes	0	0
Decrease related to settlements	0	0
Balance	$ 327,000	$ 308,000