Accounts Receivable and Sales Concentrations (Tables)

12 Months Ended

Dec. 31, 2015

Receivables [Abstract]

Summary of Accounts Receivables

	December 31,
	2015		2014
Trade	$	123,689	$	98,030
Less - allowance for doubtful accounts		684		520
Accounts receivable, net	$	123,005	$	97,510

Summary of Activity in the Allowance for Doubtful Accounts

Activity in the allowance for doubtful accounts is as follows:

Description	Balance at Beginning of Year		Additions		Write- offs			Currency Impacts			Balance at End of Year
December 31, 2015
Allowance for doubtful accounts	$	520	$	208	$	(8	)	$	(36	)	$	684
December 31, 2014
Allowance for doubtful accounts	$	445	$	208	$	(123	)	$	(10	)	$	520
December 31, 2013
Allowance for doubtful accounts	$	311	$	177	$	(47	)	$	4		$	445