Note 1 - Summary of Significant Accounting Policies (Detail) - Accounts Receivable and Allowance for Doubtful Accounts, Activity (Allowance for Doubtful Accounts [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Allowance for Doubtful Accounts [Member]
Balance, Beginning	$ 18	$ 23	$ 41
Charged to Expense	1	0	0
(Write-offs) Net of Recoveries	(2)	(5)	(18)
Balance, Ending	$ 17	$ 18	$ 23