Note 2 - Allowance for Doubtful Accounts Receivable (Tables)

12 Months Ended

Dec. 31, 2014

Receivables [Abstract]

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

	2014			2013
Balance at the beginning of year	$	560,000		$	725,000
Provision for bad debts		197,000			161,000
Charge-offs		(105,000	)		(337,000	)
Recoveries		28,000			11,000
Balance at the end of year	$	680,000		$	560,000