Condensed Consolidated Statements of Operations - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue:
Total revenue	$ 1,963,294	$ 5,796,320	$ 4,188,768	$ 8,999,145
Operating expenses:
Cost of product and product-related services revenue	$ 974,642	$ 2,508,371	$ 1,990,134	$ 4,553,898
Type of Cost, Good or Service [Extensible List]	htgm:ProductAndProductRelatedServicesMember	htgm:ProductAndProductRelatedServicesMember	htgm:ProductAndProductRelatedServicesMember	htgm:ProductAndProductRelatedServicesMember
Selling, general and administrative	$ 4,255,485	$ 4,740,710	$ 8,930,748	$ 9,141,576
Research and development	1,732,776	3,253,639	3,659,051	5,328,387
Total operating expenses	6,962,903	10,502,720	14,579,933	19,023,861
Operating loss	(4,999,609)	(4,706,400)	(10,391,165)	(10,024,716)
Other income (expense):
Interest expense	(250,759)	(238,796)	(476,089)	(472,763)
Interest income	68,002	154,774	209,898	336,211
Other income			22,268
Loss on extinguishment of MidCap Credit Facility and QNAH Convertible Note	(522,394)		(522,394)
Total other expense	(705,151)	(84,022)	(766,317)	(136,552)
Net loss before income taxes	(5,704,760)	(4,790,422)	(11,157,482)	(10,161,268)
Provision for income taxes	(5,791)	(6,848)	(10,967)	(6,848)
Net loss	$ (5,710,551)	$ (4,797,270)	$ (11,168,449)	$ (10,168,116)
Net loss per share, basic and diluted	$ (0.09)	$ (0.17)	$ (0.17)	$ (0.36)
Shares used in computing net loss per share, basic and diluted	65,757,458	28,657,384	65,162,695	28,629,189
Product and Product-related Services
Revenue:
Total revenue	$ 1,728,526	$ 4,424,368	$ 3,716,663	$ 7,086,873
Collaborative Development Services
Revenue:
Total revenue	$ 234,768	$ 1,371,952	$ 472,105	$ 1,912,272