Note 1 - Summary of Significant Accounting Policies (Details) - Allowance for Doubtful Accounts Activities (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Allowance for Doubtful Accounts Activities [Abstract]
Balance at beginning of year	$ 423	$ 420
Amounts charged to expense	187	153
Uncollectible accounts written off, net of recovery		(150)
Balance at end of year	$ 610	$ 423