Hedging (Tables)

3 Months Ended

Mar. 31, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]

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		Condensed Consolidated Balance Sheets Classification	Estimated Fair Value
Type of Cash Flow Hedge				Asset		(Liability)
Foreign currency forward exchange contracts	$	13,018	Other current 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 March 31, 2018 is as follows (in thousands):

	Contractual/ Notional Amount		Condensed Consolidated Balance Sheets Classification	Estimated Fair Value
Type of Cash Flow Hedge				Asset		(Liability)
Foreign currency forward exchange contracts	$	9,073	Other current assets	$	133	$	—

Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]

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 March 31, 2018 is as follows (in thousands):

	Contractual/ Notional Amount		Condensed Consolidated Balance Sheets Classification	Estimated Fair Value
Type of Cash Flow Hedge				Asset		(Liability)
Foreign currency forward exchange contracts	$	9,073	Other current assets	$	133	$	—

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		Condensed Consolidated Balance Sheets Classification	Estimated Fair Value
Type of Cash Flow Hedge				Asset		(Liability)
Foreign currency forward exchange contracts	$	13,018	Other current assets	$	508	$	—

The following table summarizes the effect of derivative instruments on the condensed consolidated financial statements as a loss (gain) as follows (in thousands):

	Three Months Ended
	March 31,
	2018			2017
Cost of sales	$	(57	)	$	10
Research and development	(80		)	14
Selling, general and administrative	(27		)	5
Total	$	(164	)	$	29

Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss) [Table Text Block]

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

	Three Months Ended
	March 31,
	2018			2017
Beginning balance of unrealized loss on forward exchange contracts	$	(177	)	$	(527	)
Other comprehensive income (loss) before reclassifications	(168		)	473
Amounts reclassified from other comprehensive income (loss)	(164		)	29
Other comprehensive income (loss)	(332		)	502
Ending balance of unrealized loss on forward exchange contracts	$	(509	)	$	(25	)