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Stock-Based Compensation - Summary of Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Total stock-based compensation expense	$ 1,290	$ 937
Stock Option Plan [Member] | Cost of Revenues [Member]
Total stock-based compensation expense	22	5
Stock Option Plan [Member] | Research and Development [Member]
Total stock-based compensation expense	257	194
Stock Option Plan [Member] | General and Administrative [Member]
Total stock-based compensation expense	778	634
Stock Option Plan [Member] | Sales and Marketing [Member]
Total stock-based compensation expense	$ 233	$ 104

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- Definition

Amount of noncash expense for share-based payment arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585

+ Details

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