Note 9 - Employee Benefits (Detail) - Nonvested option awards activity: (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Service-based options:
Granted	96,250
Granted (in Dollars per share)	$ 7.22	$ 8.54	$ 9.31
Forfeited	11,700
Service-Based Options [Member]
Service-based options:
Shares - Nonvested	204,740
Weighted Average Grant Date Fair Value - Nonvested (in Dollars per share)	$ 8.23
Weighted Average Remaining Contractual Life (in Years) - Nonvested	5 years
Granted	96,250
Granted (in Dollars per share)	$ 7.22
Granted	6 years 328 days
Vested	(92,870)
Vested (in Dollars per share)	$ 8.09
Vested	4 years 146 days
Forfeited	(9,900)
Forfeited (in Dollars per share)	$ 7.94
Forfeited	4 years 6 months
Shares - Nonvested	198,220
Weighted Average Grant Date Fair Value - Nonvested (in Dollars per share)	$ 7.82
Weighted Average Remaining Contractual Life (in Years) - Nonvested	5 years 73 days