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Stock-Based Compensation (Tables)
 9 Months Ended
Sep. 30, 2018
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 nine months ended September 30, 2018 and 2017 were as follows:

 
 
 
 
 
Nine Months Ended
September 30,
 
2018
 
2017
Risk-free interest rate
2.81
%
 
1.96
%
Expected volatility
36.60
%
 
35.53
%
Expected life (in years)
4.29

 
4.22

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 three and nine months ended September 30, 2018 and 2017:
 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
 
2018
 
2017
 
2018
 
2017
Cost of product sales
$
40

 
$
68

 
$
122

 
$
222

Cost of service sales
—

 
—

 
—

 
1

Research and development
177

 
155

 
496

 
514

Sales, marketing and support
138

 
190

 
485

 
679

General and administrative
505

 
396

 
1,349

 
1,205

 
$
860

 
$
809

 
$
2,452

 
$
2,621
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, June 30, 2017
$
(13,610
)
 
$
(3
)
 
$
(113
)
 
$
(13,726
)
Other comprehensive income before reclassifications
1,956

 
2

 
1

 
1,959

Amounts reclassified from AOCI to Other income, net 
—

 
—

 
18

 
18

Net other comprehensive income, September 30, 2017
1,956

 
2

 
19

 
1,977

Balance, September 30, 2017
$
(11,654
)
 
$
(1
)
 
$
(94
)
 
$
(11,749
)

The balances for the nine months ended September 30, 2018 and 2017 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, 2017
$
(11,247
)
 
$
(1
)
 
$
(69
)
 
$
(11,317
)
Other comprehensive (loss) income before reclassifications
(2,185
)
 
1

 
11

 
(2,173
)
Amounts reclassified from AOCI to Other income, net 
—

 
—

 
38

 
38

Net other comprehensive (loss) income, September 30, 2018
(2,185
)
 
1

 
49

 
(2,135
)
Balance, September 30, 2018
$
(13,432
)
 
$
—

 
$
(20
)
 
$
(13,452
)
 
 
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
4,997

 
(1
)
 
5

 
5,001

Amounts reclassified from AOCI to Other income, net
—

 
—

 
59

 
59

Net other comprehensive income (loss), September 30, 2017
4,997

 
(1
)
 
64

 
5,060

Balance, September 30, 2017
$
(11,654
)
 
$
(1
)
 
$
(94
)
 
$
(11,749
)