Principles of Consolidation (Tables)

6 Months Ended

Jun. 30, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Share-Based Payment Arrangement, Expensed and Capitalized, Amount

The following table summarizes total stock-based compensation expense for each of the line items on our condensed consolidated statement of operations:

	Three Months Ended				Six Months Ended
	June 30, 2021		June 30, 2020		June 30, 2021		June 30, 2020
Cost of Sales
Product	$	178	$	41	$	288	$	195
Service	36		52		(8)		169
Total cost of sales	$	214	$	93	$	280	$	364
Operating Expenses
Selling, general and administrative	$	2,526	$	1,617	$	4,208	$	3,140
Research and development	543		459		889		841
Total operating expenses	$	3,069	$	2,076	$	5,097	$	3,981