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Stock-Based Compensation - Schedule of Stock Based Compensation Expense (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2017 | Mar. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Allocated Share-based Compensation Expense | $ 960 | $ 1,053
Cost of product sales |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Allocated Share-based Compensation Expense | 82 | 90
Cost of service sales |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Allocated Share-based Compensation Expense | 0 | 1
Research and development |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Allocated Share-based Compensation Expense | 189 | 186
Sales, marketing and support |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Allocated Share-based Compensation Expense | 268 | 273
General and administrative |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Allocated Share-based Compensation Expense | $ 421 | $ 503

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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