Industry, Geographic and Revenue Disaggregation - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Net sales	$ 2,271	$ 1,355	$ 5,827	$ 3,848
Accelerate Pheno™ revenue
Disaggregation of Revenue [Line Items]
Net sales	2,221	1,325	5,702	3,760
Other revenue
Disaggregation of Revenue [Line Items]
Net sales	50	30	125	88
Products
Disaggregation of Revenue [Line Items]
Net sales	2,143	1,331	5,531	3,798
Services
Disaggregation of Revenue [Line Items]
Net sales	128	24	296	50
Domestic
Disaggregation of Revenue [Line Items]
Net sales	1,757	1,172	4,308	2,988
Foreign
Disaggregation of Revenue [Line Items]
Net sales	$ 514	$ 183	$ 1,519	$ 860