Note 5 - Stock-Based Compensation (Details) - Restricted Stock Units	0 Months Ended			12 Months Ended	9 Months Ended
	May 17, 2013	Apr. 15, 2013	Mar. 14, 2013	Dec. 31, 2012	Sep. 30, 2013 Restricted Stock Units (RSUs) [Member]
Note 5 - Stock-Based Compensation (Details) - Restricted Stock Units [Line Items]
Balance at December 31, 2012					256,616
Balance at September 30, 2013					212,676
Granted	1,454	6,729	14,416	125,133	22,599
Forfeited					0
Vested					(66,539)