Revenue from Contract with Customer - Schedule of Changes in Contract Liability (Details) - USD ($)	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Disaggregation Of Revenue [Line Items]
Beginning Balance	$ 410,947	$ 837,885
Deferral of revenue	1,055,701	465,311
Recognition of deferred revenue	(711,205)	(854,479)
Ending Balance	755,443	448,717
Product Revenue
Disaggregation Of Revenue [Line Items]
Beginning Balance	116,547	39,426
Deferral of revenue	113,038	90,352
Recognition of deferred revenue	(101,419)	(91,797)
Ending Balance	128,166	37,981
Custom RUO Assay Design
Disaggregation Of Revenue [Line Items]
Beginning Balance	50,000	197,606
Deferral of revenue	466,885	169,000
Recognition of deferred revenue	(424,434)	(238,724)
Ending Balance	92,451	127,882
Sample Processing
Disaggregation Of Revenue [Line Items]
Beginning Balance	244,400	490,536
Deferral of revenue	475,778	135,041
Recognition of deferred revenue	(185,352)	(342,723)
Ending Balance	$ 534,826	282,854
Collaborative Development Services
Disaggregation Of Revenue [Line Items]
Beginning Balance		110,317
Deferral of revenue		70,918
Recognition of deferred revenue		$ (181,235)