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Note 1 - Significant Accounting Policies (Detail) - Summary of Allowance for Doubtful Accounts (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Beginning Balance	$ 1,711	$ 1,537	$ 1,845
Additional provisions to allowance	904	713	422
Write-offs and other deductions	(886)	(539)	(730)
Ending Balance	$ 1,729	$ 1,711	$ 1,537

Amount of the current period expense charged against operations, the offset which is generally to the allowance for doubtful accounts for the purpose of reducing receivables, including notes receivable, to an amount that approximates their net realizable value (the amount expected to be collected).

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