Supplemental Information (Tables)

12 Months Ended

Dec. 31, 2017

Disclosure Text Block Supplement [Abstract]

Schedule of Allowance for Doubtful Accounts

Allowance for Doubtful Accounts

	2017			2016			2015
Balance at beginning of period	$	2,591		$	2,138			1,887
Bad debt expense		1,480			1,089			268
Write-offs, net of recoveries		(219	)		(635	)		(8	)
Effect of foreign currency translation		1			(1	)		(9	)
Balance at end of period	$	3,853		$	2,591		$	2,138

Schedule of Income Tax Valuation Allowance

Income Tax Valuation Allowance

	2017		2016		2015
Balance at beginning of period	$	1,131	$	933		542
Provision for income taxes - valuation allowance		505		198		391
Balance at end of period	$	1,636	$	1,131	$	933