Note 2 - Allowance for Doubtful Accounts Receivable (Details) - Allowance for Doubtful Accounts Receivable (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Allowance for Doubtful Accounts Receivable [Abstract]
Balance	$ 725,000	$ 758,000
Provision for bad debts	161,000	74,000
Charge-offs	(337,000)	(125,000)
Recoveries	11,000	18,000
Balance	$ 560,000	$ 725,000