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Note 5 - Accounts Receivable, Notes Receivable and Customer Concentrations (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Allowance for Doubtful Accounts Receivable, Current	$ 14,000	$ 30,000
Allowance for Loan and Lease Losses, Write-offs	$ 1,000	$ 8,000

Reflects the amount of loans and leases that have been removed, or charged off, from both loan receivables and the reserve for credit losses, typically because they are considered to be not salvageable or have been purchased by unconsolidated collection entities.

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