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Description of the Company and Basis of Presentation - Consolidated Statements of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities:
Net income	$ (6,685)	$ (9,151)	$ (2,025)	$ 4	$ (15,836)	$ (2,021)
Changes in operating assets and liabilities:
Contract assets					1,974	(2,026)
Income taxes payable					(2,652)	(5,870)
Net cash provided by operating activities					$ 1,184	$ 4,381

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