Revenue Recognition (Reagent Rental Programs) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Lease receivable asset	$ 14,300		$ 14,300		$ 11,100
Lease receivable asset reclassified to accounts receivable	500		1,600
Impairment charge			5,148	$ 1,993
Operating-type reagent rental programs
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Instruments transferred to property and equipment	2,800	$ 2,600	8,600	$ 6,600
Impairment charge	1,300		5,100
Reagent rental programs
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Estimation of future revenues	$ 39,100		$ 39,100