Condensed Consolidated Statements of Operations - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenue:
Total revenue	$ 2,225,474	$ 3,202,825
Operating expenses:
Cost of product and product-related services revenue	$ 1,015,492	$ 2,045,527
Type of Cost, Good or Service [Extensible List]	htgm:ProductAndProductRelatedServicesMember	htgm:ProductAndProductRelatedServicesMember
Selling, general and administrative	$ 4,675,263	$ 4,400,866
Research and development	1,926,275	2,074,748
Total operating expenses	7,617,030	8,521,141
Operating loss	(5,391,556)	(5,318,316)
Other income (expense):
Interest expense	(225,330)	(233,967)
Interest income	141,896	181,437
Other income	22,268
Total other expense	(61,166)	(52,530)
Net loss before income taxes	(5,452,722)	(5,370,846)
Provision for income taxes	(5,176)
Net loss	$ (5,457,898)	$ (5,370,846)
Net loss per share, basic and diluted	$ (0.08)	$ (0.19)
Shares used in computing net loss per share, basic and diluted	64,567,932	28,600,679
Product and Product-related Services
Revenue:
Total revenue	$ 1,988,137	$ 2,662,505
Collaborative Development Services
Revenue:
Total revenue	$ 237,337	$ 540,320