Note 2 - Stock Based Compensation Plans (Detail) - Stock Option Activity (USD $)	3 Months Ended
	Mar. 31, 2013
Outstanding at beginning of period	456,900
Outstanding at beginning of period (in Dollars per share)	$ 6.12
Outstanding at end of period	452,900
Outstanding at end of period (in Dollars per share)	$ 6.13
Outstanding at end of period	8 years 146 days
Options exercisable at end of period	219,900
Options exercisable at end of period (in Dollars per share)	$ 7.33
Options exercisable at end of period	7 years 6 months
Options Vested or Expected to Vest	452,900
Options Vested or Expected to Vest (in Dollars per share)	$ 6.13
Options Vested or Expected to Vest	8 years 146 days
Options granted	0
Options exercised	0
Options forfeited	(4,000)
Options forfeited (in Dollars per share)	$ 5.00