Hedging (Tables)

12 Months Ended

Dec. 31, 2017

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Foreign Exchange Contracts, Statement of Financial Position

A summary of the aggregate contractual or notional amounts, balance sheet location and estimated fair values of derivative financial instruments designated as cash flow hedges at December 31, 2017 is as follows (in thousands):

	Contractual / Notional Amount		Consolidated Balance Sheet Classification	Estimated Fair Value
				Asset		(Liability)
Foreign currency forward exchange contracts	$	13,018	Other assets	$	508	$	—

A summary of the aggregate contractual or notional amounts, balance sheet location and estimated fair values of derivative financial instruments designated as cash flow hedges at December 31, 2016 is as follows (in thousands):

	Contractual / Notional Amount		Consolidated Balance Sheet Classification	Estimated Fair Value
				Asset		(Liability)
Foreign currency forward exchange contracts	$	16,166	Other assets	$	94	$	—

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value

There were no ineffective hedges for the years ended December 31, 2017, 2016 and 2015. The following table summarizes the effect of derivative instruments on the Consolidated Statements of Operations as follows (in thousands):

	December 31, 2017		December 31, 2016		December 31, 2015
Cost of sales	$	152	$	281	$	187
Research and development	211		436		305
Selling, general and administrative	70		164		135
Total derivative instrument expense	$	433	$	881	$	627

Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss)

The following is a summary of changes to comprehensive income (loss) associated with the Company's hedging activities (in thousands):

	For the Years Ended December 31,
	2017			2016			2015
Beginning balance of unrealized loss on forward exchange contracts	$	(527	)	$	(819	)	$	(752	)
Other comprehensive loss before reclassifications	(83		)	(589		)	(694		)
Amounts reclassified from other comprehensive income	433			881			627
Other comprehensive income (loss)	350			292			(67		)
Ending balance of unrealized loss on forward exchange contracts	$	(177	)	$	(527	)	$	(819	)