Condensed Consolidated Statements of Operations - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue:
Total revenue	$ 1,777,098	$ 5,404,793	$ 5,965,866	$ 14,403,938
Operating expenses:
Cost of product and product-related services revenue	$ 940,892	$ 2,939,007	$ 2,931,026	$ 7,492,905
Type of Cost, Good or Service [Extensible List]	htgm:ProductAndProductRelatedServicesMember	htgm:ProductAndProductRelatedServicesMember	htgm:ProductAndProductRelatedServicesMember	htgm:ProductAndProductRelatedServicesMember
Selling, general and administrative	$ 4,752,321	$ 4,516,341	$ 13,683,069	$ 13,657,917
Research and development	1,255,416	2,570,355	4,914,467	7,898,742
Total operating expenses	6,948,629	10,025,703	21,528,562	29,049,564
Operating loss	(5,171,531)	(4,620,910)	(15,562,696)	(14,645,626)
Other income (expense):
Interest expense	(273,312)	(241,860)	(749,401)	(714,623)
Interest income	34,636	118,860	244,534	455,071
Other income			22,268
Loss on extinguishment of MidCap Credit Facility and QNAH Convertible Note			(522,394)
Total other expense	(238,676)	(123,000)	(1,004,993)	(259,552)
Net loss before income taxes	(5,410,207)	(4,743,910)	(16,567,689)	(14,905,178)
Benefit from (provision for) income taxes	(1,581)	3,678	(12,548)	(3,170)
Net loss	$ (5,411,788)	$ (4,740,232)	$ (16,580,237)	$ (14,908,348)
Net loss per share, basic and diluted	$ (0.07)	$ (0.15)	$ (0.25)	$ (0.50)
Shares used in computing net loss per share, basic and diluted	72,323,436	31,367,044	67,567,031	29,551,836
Product and Product-related Services
Revenue:
Total revenue	$ 1,701,068	$ 4,311,043	$ 5,417,731	$ 11,397,916
Collaborative Development Services
Revenue:
Total revenue	$ 76,030	$ 1,093,750	$ 548,135	$ 3,006,022