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Revenue and Accounts Receivable Credit Concentration - Summary of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Disaggregation Of Revenue [Line Items]
Revenues	$ 54,506	$ 45,557
Diagnostic Tests
Disaggregation Of Revenue [Line Items]
Revenues	48,937	40,919
Services
Disaggregation Of Revenue [Line Items]
Revenues	$ 5,569	$ 4,638

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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