Consolidated Statements of Operations (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Related party activity research and development expenses	$ 565	$ 235	$ 152
Related party activity in selling, general and administrative expenses	89	37	180
Product revenue
Related party revenue	505	580	720
Cost of revenue, related party activity	1,936	205	234
Service and other revenue
Related party revenue	114	202	118
Cost of revenue, related party activity	74	52	0
Collaboration and license revenue
Cost of revenue, related party activity	$ 0	$ 1,000	$ 0

Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

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+ Details