Stockholder's Equity - Schedule of Stock Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share-based compensation expense	$ 805	$ 874
Cost of product sales
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share-based compensation expense	40	41
Cost of service sales
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share-based compensation expense	0	0
Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share-based compensation expense	153	172
Sales, marketing and support
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share-based compensation expense	154	182
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share-based compensation expense	$ 458	$ 479