Note 1 - Summary of Significant Interim Accounting Policies (Details) (USD $)	3 Months Ended		9 Months Ended				9 Months Ended		3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	May 31, 2013	Jul. 31, 2013 Scenario, Forecast [Member] Effective July 1, 2014 [Member]	Sep. 30, 2013 Stock Appreciation Rights (SARs) [Member]	Sep. 30, 2012 Stock Appreciation Rights (SARs) [Member]	Sep. 30, 2013 Stock Compensation Plan [Member]	Sep. 30, 2012 Stock Compensation Plan [Member]	Sep. 30, 2013 Stock Compensation Plan [Member]	Sep. 30, 2012 Stock Compensation Plan [Member]	Sep. 30, 2013 Share-Based Compensation [Member]	Sep. 30, 2012 Share-Based Compensation [Member]
Note 1 - Summary of Significant Interim Accounting Policies (Details) [Line Items]
Amortization of Intangible Assets	$ 504,000	$ 241,000	$ 577,000	$ 723,000
Advertising Expense	11,000	11,000	66,000	40,000
Shipping, Handling and Transportation Costs	2,035,000	1,324,000	4,792,000	4,110,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in Shares)									234,000	197,000	297,000	238,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Period Increase (Decrease), Weighted Average Exercise Price (in Dollars per share)									$ 12.99	$ 13.27	$ 12.75	$ 13.10
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)	2,481,731		2,481,731		2,500,000
Share-based Compensation	170,000	181,000	789,000	893,000
Deferred Income Tax Expense (Benefit)			(584,000)	42,000									(72,000)	(96,000)
Grant Period	5 years		5 years
Director Grant Period	10 years		10 years
Employee Service Share-based Compensation, Cash Received from Exercise of Stock Options			319,000	617,000
Shares Received as Payment for Stock Options Exercised (in Shares)				8,403
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in Shares)			34,758	8,896
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	895,000		895,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value	52,000	54,000	92,000	187,000				78,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)	$ 3.19	$ 3.10	$ 3.01	$ 3.38			$ 2.97	$ 3.59
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value							$ 261,000
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted (in Shares)							59,716	65,752