Condensed Consolidated Statements of Operations - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue:
Total revenue	$ 5,796,320	$ 4,910,766	$ 8,999,145	$ 9,069,418
Operating expenses:
Cost of product and product-related services revenue	$ 2,508,371	$ 1,450,682	$ 4,553,898	$ 2,587,745
Type of Cost, Good or Service [Extensible List]	htgm:ProductAndProductRelatedServicesMember	htgm:ProductAndProductRelatedServicesMember	htgm:ProductAndProductRelatedServicesMember	htgm:ProductAndProductRelatedServicesMember
Selling, general and administrative	$ 4,740,710	$ 4,764,751	$ 9,141,576	$ 10,422,583
Research and development	3,253,639	2,758,984	5,328,387	5,348,270
Total operating expenses	10,502,720	8,974,417	19,023,861	18,358,598
Operating loss	(4,706,400)	(4,063,651)	(10,024,716)	(9,289,180)
Other income (expense):
Interest expense	(238,796)	(233,306)	(472,763)	(415,823)
Interest income	154,774	197,773	336,211	330,936
Loss on extinguishment of Growth Term Loan				(105,064)
Total other income (expense)	(84,022)	(35,533)	(136,552)	(189,951)
Net loss before income taxes	(4,790,422)	(4,099,184)	(10,161,268)	(9,479,131)
Provision for income taxes	6,848	3,545	6,848	3,545
Net loss	$ (4,797,270)	$ (4,102,729)	$ (10,168,116)	$ (9,482,676)
Net loss per share, basic and diluted	$ (0.17)	$ (0.14)	$ (0.36)	$ (0.36)
Shares used in computing net loss per share, basic and diluted	28,657,384	28,375,379	28,629,189	26,549,895
Product and Product-related Services
Revenue:
Total revenue	$ 4,424,368	$ 2,023,312	$ 7,086,873	$ 3,756,858
Collaborative Development Services
Revenue:
Total revenue	$ 1,371,952	$ 2,887,454	$ 1,912,272	$ 5,312,560