Note 16 - Subsequent Events (Detail) (Subsequent Event [Member], USD $)	12 Months Ended
	Dec. 31, 2012
Additional Share Repurchase Authorized [Member]
Stock Repurchase Program, Authorized Amount	$ 2,000,000
Total Repurchase Amount [Member]
Stock Repurchase Program, Authorized Amount	2,200,000
Previous Expansion [Member]
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 200,000