Revenue from Contract with Customer - Schedule of Changes in Contract Liability (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Disaggregation Of Revenue [Line Items]
Beginning Balance	$ 410,947	$ 837,885
Deferral of revenue	110,679	244,496
Recognition of deferred revenue	(165,924)	(477,572)
Ending Balance	355,702	604,809
Product Revenue
Disaggregation Of Revenue [Line Items]
Beginning Balance	116,547	39,426
Deferral of revenue	50,667	55,476
Recognition of deferred revenue	(36,544)	(65,345)
Ending Balance	130,670	29,557
Custom RUO Assay Design
Disaggregation Of Revenue [Line Items]
Beginning Balance	50,000	197,606
Deferral of revenue	11,685	135,250
Recognition of deferred revenue	(11,685)	(127,027)
Ending Balance	50,000	205,829
Sample Processing
Disaggregation Of Revenue [Line Items]
Beginning Balance	244,400	490,536
Deferral of revenue	48,327	53,770
Recognition of deferred revenue	(117,695)	(261,561)
Ending Balance	$ 175,032	282,745
Collaborative Development Services
Disaggregation Of Revenue [Line Items]
Beginning Balance		110,317
Recognition of deferred revenue		(23,639)
Ending Balance		$ 86,678