Note 2 - Allowance for Doubtful Accounts Receivable (Tables)

12 Months Ended

Dec. 31, 2012

Allowance for Credit Losses on Financing Receivables [Table Text Block]

	2012			2011
Balance at the beginning of year	$	758,000		$	600,000
Provision for bad debts		74,000			239,000
Charge-offs		(125,000	)		(90,000	)
Recoveries		18,000			9,000
Balance at the end of year	$	725,000		$	758,000