Nexperia Arrangement (Details) - USD ($)			1 Months Ended						2 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Jul. 16, 2021	Apr. 04, 2018	Jun. 30, 2020	Dec. 31, 2019	Oct. 31, 2019	Apr. 30, 2019	Jan. 31, 2019	Oct. 31, 2018	Jul. 31, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2021	May 18, 2021	Mar. 01, 2021
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
License fees		$ 9,000,000	$ 5,000,000		$ 3,000,000	$ 3,000,000		$ 3,000,000						$ 9,000,000
Revenue from product and license fees										$ 4,604,000	$ 2,013,000	$ 19,123,000	$ 10,271,000
License and Service
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenue from product and license fees	$ 8,000,000									$ 0	$ 0	$ 8,000,000	$ 5,000,000
Series 3 Preferred Stock
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Issuance of preferred stock		16,000,000
Tranche A Loan
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Long-term loan facility		5,000,000
Reduction of debt			$ 5,000,000
Proceeds from issuance of debt							$ 5,000,000
Tranche B Loan
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Long-term loan facility		10,000,000							$ 8,000,000					8,000,000		$ 8,000,000		$ 10,000,000
Proceeds from issuance of debt									$ 8,000,000
Tranche C Loan
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revolving loan		$ 10,000,000																$ 10,000,000
Proceeds from issuance of debt															$ 10,000,000
Tranche B-1 Loan
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Long-term loan facility				$ 2,000,000										$ 2,000,000			$ 2,000,000
Proceeds from issuance of debt				$ 2,000,000
Repayment of Nexperia debt	$ 8,000,000