Condensed Consolidated Statements of Operations - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenue:
Total revenue	$ 3,202,825	$ 4,158,652
Operating expenses:
Cost of product and product-related services revenue	$ 2,045,527	$ 1,137,063
Type of Cost, Good or Service [Extensible List]	htgm:ProductAndProductRelatedServicesMember	htgm:ProductAndProductRelatedServicesMember
Selling, general and administrative	$ 4,400,866	$ 5,657,832
Research and development	2,074,748	2,589,286
Total operating expenses	8,521,141	9,384,181
Operating loss	(5,318,316)	(5,225,529)
Other income (expense):
Interest expense	(233,967)	(182,517)
Interest income	181,437	133,163
Loss on extinguishment of Growth Term Loan		(105,064)
Total other income (expense)	(52,530)	(154,418)
Net loss	$ (5,370,846)	$ (5,379,947)
Net loss per share, basic and diluted	$ (0.19)	$ (0.22)
Shares used in computing net loss per share, basic and diluted	28,600,679	24,704,128
Product and Product-related Services
Revenue:
Total revenue	$ 2,662,505	$ 1,733,546
Collaborative Development Services
Revenue:
Total revenue	$ 540,320	$ 2,425,106