Summary of Significant Accounting Policies - Disaggregation of Revenue by Major Resource (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation Of Revenue [Line Items]
Total revenue	$ 3,677	$ 7,428	$ 16,822	$ 21,078
Product Instruments [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	814	522	2,528	1,427
Product Consumables [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	1,822	3,765	6,442	11,150
Instrument Rentals [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	5	19	74	57
Total Product Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	2,641	4,306	9,044	12,634
Contribution Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	$ 1,036	$ 3,122	$ 7,778	$ 8,444