Note 1 - Summary of Significant Interim Accounting Policies (Details) (USD $)	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended			3 Months Ended		6 Months Ended		1 Months Ended	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 General and Administrative Expense [Member]	Jun. 30, 2013 General and Administrative Expense [Member]	Jun. 30, 2014 General and Administrative Expense [Member]	Jun. 30, 2013 General and Administrative Expense [Member]	Jun. 30, 2014 Outside Directors [Member] Employee Stock Option [Member]	Jun. 30, 2014 Stock Compensation Plan [Member]	Jun. 30, 2013 Stock Compensation Plan [Member]	Jun. 30, 2014 Stock Compensation Plan [Member]	Jun. 30, 2013 Stock Compensation Plan [Member]	Feb. 28, 2014 Restricted Stock [Member]	Jun. 30, 2014 Stock Appreciation Rights (SARs) [Member]	Jun. 30, 2013 Stock Appreciation Rights (SARs) [Member]	Jun. 30, 2014 Stock Appreciation Rights (SARs) [Member]	Jun. 30, 2013 Stock Appreciation Rights (SARs) [Member]	Jul. 31, 2013 Interest Rate Swap [Member]
Note 1 - Summary of Significant Interim Accounting Policies (Details) [Line Items]
Amortization of Intangible Assets	$ 516,000	$ 36,000	$ 1,033,000	$ 73,000
Advertising Expense	32,000	36,000	65,000	55,000
Shipping, Handling and Transportation Costs	2,231,000	1,367,000	4,348,000	2,757,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in Shares)										0	333,000	5,000	329,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Period Increase (Decrease), Weighted Average Exercise Price (in Dollars per share)											$ 12.65	$ 16.00	$ 12.67
Derivative, Fixed Interest Rate																			2.53%
Number of Reportable Segments			2
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares)	2,500,000		2,500,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares)	2,236,531		2,236,531
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in Shares)														50,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period														3 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period														3 years
Allocated Share-based Compensation Expense					128,000	28,000	955,000	618,000
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	45,000	10,000	156,000	72,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	634,000		634,000
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period			5 years						10 years
Employee Service Share-based Compensation, Cash Received from Exercise of Stock Options			685,000	140,000
Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options			0	0
Company Stock Received, in Lieu of Cash, Stock Options Exercised (in Shares)				5,345
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in Shares)			68,704	10,204											8,335	0	11,439	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	2,473,000		2,473,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value	172,000	25,000	285,000	40,000											60,000		76,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)	$ 4.78	$ 2.64	$ 4.11	$ 2.95													$ 4.04	$ 2.97
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value															$ 1,106,000		$ 1,106,000
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted (in Shares)																	68,691	59,716