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Hedging (Tables)
 9 Months Ended
Sep. 30, 2017
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, 2016 is as follows (in thousands):
 
 
Contractual/ Notional
Amount
 
Condensed Consolidated Balance Sheet
Classification
 
Estimated Fair Value
Type of Cash Flow Hedge
 
Asset
 
(Liability)
Foreign currency forward exchange contracts
 
$
16,166

 
Other current assets
 
$
94

 
$
—

 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 September 30, 2017 is as follows (in thousands):
 
 
Contractual/ Notional
Amount
 
Condensed Consolidated Balance Sheet
Classification
 
Estimated Fair Value
Type of Cash Flow Hedge
 
Asset
 
(Liability)
Foreign currency forward exchange contracts
 
$
16,346

 
Other current assets
 
$
301

 
$
—
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 September 30, 2017 is as follows (in thousands):
 
 
Contractual/ Notional
Amount
 
Condensed Consolidated Balance Sheet
Classification
 
Estimated Fair Value
Type of Cash Flow Hedge
 
Asset
 
(Liability)
Foreign currency forward exchange contracts
 
$
16,346

 
Other current assets
 
$
301

 
$
—



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
 
Condensed Consolidated Balance Sheet
Classification
 
Estimated Fair Value
Type of Cash Flow Hedge
 
Asset
 
(Liability)
Foreign currency forward exchange contracts
 
$
16,166

 
Other current assets
 
$
94

 
$
—



The following table summarizes the effect of derivative instruments on the consolidated financial statements as a loss (gain) as follows (in thousands):
 
Three Months Ended
 
Nine Months Ended
 
September 30,
 
September 30,
 
2017
 
2016
 
2017
 
2016
Cost of sales
$
(48
)
 
$
39

 
$
(98
)
 
$
222

Research and development
(67
)
 
60

 
(137
)
 
355

Selling, general and administrative
(22
)
 
23

 
(45
)
 
137

       Total
$
(137
)
 
$
122

 
$
(280
)
 
$
714
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
 
Nine Months Ended
 
September 30,
 
September 30,
 
2017

2016
 
2017
 
2016
Beginning balance of unrealized loss on forward exchange contracts
$
(96
)
 
$
(603
)
 
$
(527
)
 
$
(819
)
Other comprehensive income (loss) before reclassifications
(105
)
 
127

 
469

 
(249
)
Amounts reclassified from other comprehensive income (loss)
(137
)
 
122

 
(280
)
 
714

Other comprehensive income (loss)
(242
)
 
249

 
189

 
465

Ending balance of unrealized loss on forward exchange contracts
$
(338
)
 
$
(354
)
 
$
(338
)
 
$
(354
)