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Stock-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2017
Share-based Compensation [Abstract]  
Schedule of share-based payment award, stock options, valuation assumptions
The weighted average assumptions utilized to determine the fair value of options granted during the six months ended June 30, 2017 and 2016 were as follows:

 
 
 
 
 
Six Months Ended
June 30,
 
2017
 
2016
Risk-free interest rate
1.96
%
 
1.43
%
Expected volatility
35.53
%
 
38.22
%
Expected life (in years)
4.22

 
4.17

Dividend yield
0
%
 
0
%
Schedule of Share-based Compensation, Activity
The following table presents stock-based compensation expense, including expense for the ESPP, in the Company's consolidated statements of operations for the six months ended June 30, 2017 and 2016:
 
Three Months Ended
June 30,
 
Six Months Ended
June 30,
 
2017
 
2016
 
2017
 
2016
Cost of product sales
$
72

 
$
75

 
$
154

 
$
165

Cost of service sales
1

 
—

 
1

 
1

Research and development
170

 
166

 
359

 
352

Sales, marketing and support
221

 
251

 
489

 
524

General and administrative
388

 
336

 
809

 
839

 
$
852

 
$
828

 
$
1,812

 
$
1,881
Schedule of Accumulated Other Comprehensive Income (Loss)

 
Foreign Currency Translation
 
Unrealized Gain (Loss) on Available for Sale Marketable Securities
 
Interest Rate Swaps
 
Total Accumulated Other Comprehensive Loss
Balance, March 31, 2016
$
(8,039
)
 
$
1

 
$
(258
)
 
$
(8,296
)
Other comprehensive loss before reclassifications (1)
(4,472
)
 
—

 
(16
)
 
(4,488
)
Amounts reclassified from AOCI to Other income, net (2)
—

 
—

 
25

 
25

Net other comprehensive (loss) income, June 30, 2016
(4,472
)
 
—

 
9

 
(4,463
)
Balance, June 30, 2016
$
(12,511
)
 
$
1

 
$
(249
)
 
$
(12,759
)

The balances for the six months ended June 30, 2017 and 2016 are as follows:

 
Foreign Currency Translation
 
Unrealized Gain (Loss) on Available for Sale Marketable Securities
 
Interest Rate Swaps
 
Total Accumulated Other Comprehensive Loss
Balance, December 31, 2016
$
(16,651
)
 
$
—

 
$
(158
)
 
$
(16,809
)
Other comprehensive income (loss) before reclassifications (1)
3,041

 
(3
)
 
4

 
3,042

Amounts reclassified from AOCI to Other income, net (2)
—

 
—

 
41

 
41

Net other comprehensive income (loss), June 30, 2017
3,041

 
(3
)
 
45

 
3,083

Balance, June 30, 2017
$
(13,610
)
 
$
(3
)
 
$
(113
)
 
$
(13,726
)
 
 
Foreign Currency Translation
 
Unrealized Gain (Loss) on Available for Sale Marketable Securities
 
Interest Rate Swaps
 
Total Accumulated Other Comprehensive Loss
Balance, December 31, 2015
$
(7,363
)
 
$
1

 
$
(238
)
 
$
(7,600
)
Other comprehensive loss before reclassifications (1)
(5,148
)
 
—

 
(61
)
 
(5,209
)
Amounts reclassified from AOCI to Other income, net (2)
—

 
—

 
50

 
50

Net other comprehensive loss, June 30, 2016
(5,148
)
 
—

 
(11
)
 
(5,159
)
Balance, June 30, 2016
$
(12,511
)
 
$
1

 
$
(249
)
 
$
(12,759
)
(1) For additional information, see Note 4, "Marketable Securities."