Leases - Agreement (Details)	1 Months Ended	12 Months Ended
	Mar. 31, 2017 USD ($) ft² lease	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Jul. 02, 2021 ft²	Mar. 31, 2021 USD ($)
Leases
Security deposit	$ 450,000					$ 225,000
Additional base rent over the lease term		$ 1,500,000
Operating lease right-of-use asset		4,936,000	$ 4,950,000
Lease liability		5,858,000	5,959,000
Sublease Income		91,000	$ 89,000	$ 64,000
Newark, California
Leases
Number of operating lease agreement | lease	1
Area of land | ft²	42,900				15,000
Newark, California | Second Amendment
Leases
Operating lease right-of-use asset		1,400,000
Additional security deposit		$ 0