Note 1 - Summary of Significant Interim Accounting Policies (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	May 31, 2013
Note 1 - Summary of Significant Interim Accounting Policies (Details) [Line Items]
Amortization of Intangible Assets	$ 36,000	$ 241,000	$ 73,000	$ 482,000
Advertising Expense	36,000	19,000	55,000	30,000
Shipping, Handling and Transportation Costs	1,367,000	1,343,000	2,757,000	2,786,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Period Increase (Decrease), Weighted Average Exercise Price (in Dollars per share)	$ 12.65	$ 12.85	$ 12.67	$ 13.03
Number of Reportable Segments			2
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares)	2,501,500		2,501,500		2,500,000
Share-based Compensation	28,000	37,000	618,000	712,000
Deferred Income Tax Expense (Benefit)			(651,000)	(241,000)
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			140,000	404,000
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)		8,896	15,693
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	251,000		251,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value	25,000	30,000	40,000	133,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)	$ 2.64	$ 2.67	$ 2.95	$ 3.50
Share-Based Compensation [Member]
Note 1 - Summary of Significant Interim Accounting Policies (Details) [Line Items]
Deferred Income Tax Expense (Benefit)	10,000	13,000	72,000	96,000
Stock Appreciation Rights (SARs) [Member]
Note 1 - Summary of Significant Interim Accounting Policies (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value				55,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)			$ 2.97	$ 3.59
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value	$ 26,000		$ 26,000
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted (in Shares)			59,716	65,572
Stock Compensation Plan [Member]
Note 1 - Summary of Significant Interim Accounting Policies (Details) [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in Shares)	333,000	308,000	329,000	259,000