Consolidated Statements of Operations - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Revenue:
Total revenue	$ 21,503,894	$ 14,759,567
Operating expenses:
Cost of product and product-related services revenue	$ 5,090,475	$ 4,971,806
Type of Cost, Good or Service [Extensible List]	htgm:ProductAndProductRelatedServicesMember	htgm:ProductAndProductRelatedServicesMember
Selling, general and administrative	$ 19,974,616	$ 17,513,742
Research and development	12,598,034	9,996,627
Total operating expenses	37,663,125	32,482,175
Operating loss	(16,159,231)	(17,722,608)
Other income (expense):
Interest expense	(901,820)	(1,307,674)
Interest income	715,723	73,186
Loss on extinguishment of Growth Term Loan	(105,064)
Total other income (expense)	(291,161)	(1,234,488)
Net loss before income taxes	(16,450,392)	(18,957,096)
Provision for income taxes	3,526	2,921
Net loss	$ (16,453,918)	$ (18,960,017)
Net loss per share, basic and diluted	$ (0.60)	$ (1.79)
Shares used in computing net loss per share, basic and diluted	27,523,463	10,597,318
Product and Product-related Services
Revenue:
Total revenue	$ 9,121,390	$ 6,797,255
Collaborative Development Services
Revenue:
Total revenue	$ 12,382,504	$ 7,962,312