Note 3 - Accounts Receivable, Net - Activity for the Allowance for Uncollectible Accounts Receivable (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Balance at beginning of period	$ (785)	$ (314)	$ (114)	$ (165)
Provision for bad debt expense	(471)	(200)
Write-off, net of recoveries			$ 51