Note 3 - Accounts Recievable (Tables)

12 Months Ended

Dec. 31, 2017

Notes Tables

Schedule of Credit Losses for Financing Receivables, Current [Table Text Block]

	As of December 31,
	2017			2016
Balance, beginning of period	$	50		$	59
Provision for (recoveries of) doubtful accounts		30			16
Write-offs		(16	)		(25	)
Balance, end of period	$	64		$	50