Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Contract assets	$ 4,557	$ 4,526
Investment in non-marketable equity securities	14,002	1,450
Deferred revenue	$ 2,586	$ 1,824
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	65,109,000	64,283,000
Common stock, shares outstanding (in shares)	65,109,000	64,283,000
Affiliated Entity
Contract assets	$ 0	$ 450
Investment in non-marketable equity securities	12,713	1,450
Deferred revenue	$ 245	$ 0