Note 1 - Summary of Significant Interim Accounting Policies (Detail) (USD $)	3 Months Ended	9 Months Ended
Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Amortization of Intangible Assets	$ 241,000	$ 241,000	$ 723,000	$ 782,000
Advertising Expense	11,000	12,000	40,000	71,000
Selling, General and Administrative Expense	8,334,000	8,587,000	25,336,000	25,983,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Period Increase (Decrease), Weighted Average Exercise Price (in Dollars per share)	$ 13.27	$ 12.57	$ 13.10	$ 12.09
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares)	1,281,875		1,281,875
Share-based Compensation	181,000	181,000	893,000	1,005,000
Deferred Income Tax Expense (Benefit)			42,000	(519,000)
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			617,000	713,000
Stock Repurchased During Period, Shares (in Shares)			8,403	8,491
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in Shares)			74,045	10,900
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	855,000		855,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value	54,000	63,000	187,000	176,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)	$ 3.10	$ 3.11	$ 3.38	$ 2.74
Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in Shares)			115,004
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value			78,000	5,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)			$ 3.59	$ 2.96
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value	186,000		186,000
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted (in Shares)			65,752	127,144
Shipping, Handling and Transportation Costs [Member]
Selling, General and Administrative Expense	1,324,000	1,586,000	4,110,000	4,425,000
Outstanding Stock Awards [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in Shares)	197,000	279,000	238,000	446,000
Share-Based Compensation [Member]
Deferred Income Tax Expense (Benefit)			96,000	145,000
Exercise of Stock Options [Member]
Stock Repurchased During Period, Shares (in Shares)			8,403	8,491
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in Shares)			8,896	10,900
selling and administrative expense [Member]
Share-based Compensation			$ 893,000

No authoritative reference available.

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Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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Aggregate proceeds received by the entity during the annual period from exercises of stock or unit options and conversion of similar instruments granted under equity-based payment arrangements.

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The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc.

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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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Net number of non-option equity instruments granted to participants.

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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