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Summary of Significant Accounting Policies - Goodwill (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($)
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Beginning Balance	$ 1,651
Goodwill arising from AFIX acquisition	1,469
Ending Balance	3,120
Fortress ID
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Ending Balance	$ 1,469

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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