Note 14 - Stockholders' Equity (Detail) (USD $)	1 Months Ended			10 Months Ended	12 Months Ended
Note 14 - Stockholders' Equity (Detail) (USD $)	Aug. 31, 2010	Mar. 31, 2010	Mar. 31, 2009	Oct. 31, 2008	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Mar. 31, 2011
Stock Repurchase Program, Authorized Amount	$ 5,000,000			$ 5,000,000
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited (in Shares)						395
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares)						305,567
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period						1 year
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares)						283,367
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term					22200 years	10 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in Shares)		10,714			149,704	25,815
Stock Issued During Period, Shares, Restricted Stock Award, Gross (in Shares)			9.70		30,930	20,508	25,176
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Exercise Price (in Dollars per share)		$ 15.89	$ 1,500,000					$ 12.67
Share-based Compensation					694,000	503,000	595,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition					5 years
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized					1.3
Allocated Share-based Compensation Expense, Net of Tax					694,000	503,000	594,000
Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options					451,000	327,000	386,000
Effective Income Tax Rate, Continuing Operations					35.00%	35.00%	35.00%
Proceeds from Stock Options Exercised					66,000	43,000	692,000
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in Shares)							334,046
Restricted Stock [Member]
Share-based Compensation					327,000	170,000
Warrant [Member]
Class Of Warrant Or Right Term Of Warrants Or Rights					10 years
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per Item)					1.50
Class Of Warrant Or Rights, Period From Which Warrants Or Rights Exercisable					54 months
Class of Warrant or Right, Outstanding (in Shares)					1
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in Shares)					322,661
One Warrant [Member]
Class Of Warrant Or Rights, Period From Which Warrants Or Rights Exercisable					42 months
Total [Member]
Stock Repurchase Program, Authorized Amount	$ 10,000,000
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period					3 years
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition					2 years 36 days
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period					5 years
2001 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares)					1,000,000
Share Based Compensation Arrangement By Share Based Payment Award Term					10 years