Note 2 - Summary of Significant Accounting Policies (Detail) - Adjustments to Goodwill (USD $)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 1988
Balance at December 31	$ 3,813,000	$ 3,813,000	$ 3,813,000	$ 7,006,000

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

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