Schedule II-Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2017

Valuation And Qualifying Accounts [Abstract]

Schedule II-Valuation and Qualifying Accounts

	Balance at January 1		Additions			Deductions				Balance at December 31
2017
Accounts deducted from accounts receivable -
Allowance for doubtful accounts	$	469		96	A		(432	)	A	$	133
Accounts deducted from deferred tax assets -
Deferred tax asset valuation allowance	$	2,650		469	B		(614	)	B	$	2,505
2016
Accounts deducted from accounts receivable -
Allowance for doubtful accounts	$	377		276	A		(184	)	A	$	469
Accounts deducted from deferred tax assets -
Deferred tax asset valuation allowance	$	2,349		518	B		(217	)	B	$	2,650
2015
Accounts deducted from accounts receivable -
Allowance for doubtful accounts	$	891		372	A		(886	)	A	$	377
Accounts deducted from deferred tax assets -
Deferred tax asset valuation allowance	$	3,135		192	B		(978	)	B	$	2,349

A These balances primarily reflect additions to the allowance charged to expense resulting from the normal course of business, less deductions for recovery of accounts that were previously reserved, and additions and deductions for foreign currency translation

B These balances primarily reflect additions or deductions to the valuation allowance associated with the Netherlands defined-benefit plan and changes in foreign currency exchange rates, and deductions for expiring net operating loss carryforwards