Condensed Consolidated Statements of Operations - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenue:
Total revenue	$ 5,404,793	$ 4,706,378	$ 14,403,938	$ 13,775,796
Operating expenses:
Cost of product and product-related services revenue	$ 2,939,007	$ 1,239,702	$ 7,492,905	$ 3,827,447
Type of Cost, Good or Service [Extensible List]	htgm:ProductAndProductRelatedServicesMember	htgm:ProductAndProductRelatedServicesMember	htgm:ProductAndProductRelatedServicesMember	htgm:ProductAndProductRelatedServicesMember
Selling, general and administrative	$ 4,516,341	$ 4,709,885	$ 13,657,917	$ 15,132,468
Research and development	2,570,355	3,561,459	7,898,742	8,909,729
Total operating expenses	10,025,703	9,511,046	29,049,564	27,869,644
Operating loss	(4,620,910)	(4,804,668)	(14,645,626)	(14,093,848)
Other income (expense):
Interest expense	(241,860)	(234,392)	(714,623)	(650,215)
Interest income	118,860	195,652	455,071	526,588
Loss on extinguishment of Growth Term Loan				(105,064)
Total other income (expense)	(123,000)	(38,740)	(259,552)	(228,691)
Net loss before income taxes	(4,743,910)	(4,843,408)	(14,905,178)	(14,322,539)
Benefit from (provision for) income taxes	3,678		(3,170)	(3,545)
Net loss	$ (4,740,232)	$ (4,843,408)	$ (14,908,348)	$ (14,326,084)
Net loss per share, basic and diluted	$ (0.15)	$ (0.17)	$ (0.50)	$ (0.53)
Shares used in computing net loss per share, basic and diluted	31,367,044	28,434,406	29,551,836	27,184,968
Product and Product-related Services
Revenue:
Total revenue	$ 4,311,043	$ 1,314,844	$ 11,397,916	$ 5,071,702
Collaborative Development Services
Revenue:
Total revenue	$ 1,093,750	$ 3,391,534	$ 3,006,022	$ 8,704,094