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Note 5 - Supplemental Cash Flow Information (Detail) (USD $)	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Mar. 06, 2012
Income Taxes Paid (in Dollars)	$ 1,296,000	$ 870,000
Interest Paid (in Dollars)	$ 24,000	$ 25,000
Shares, Issued			44,912
Stock Repurchased During Period, Shares	8,403	8,491
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	74,045	10,900
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	8,896

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income.

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- Definition

Number of share options (or share units) exercised during the current period.

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- Definition

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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