Significant Accounting Policies - Additional Information (Details)	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2020 USD ($) segment reportingUnit depositoryInstitution	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Market Concentrations and Credit Risk [Line Items]
Number of business segments | segment		1
Amount of insurance coverage provided by FDIC for deposits		$ 250,000
Cash and cash equivalents uninsured amount		$ 95,100,000	$ 68,400,000
Number of depository institutions | depositoryInstitution		4
impairment of indefinite useful lives intangible		$ 1,027,000	446,000	$ 0
impairment of finite-lived intangible assets			500,000
Number of reporting units | reportingUnit		1
Goodwill impairment		$ 0	0	0
Patent application costs		$ (327,000)	(466,000)	(609,000)
Accounts receivable, net				51,000,000.0
GPO administrative fees as percent of purchase volume		3.00%
Deferred cost of sales		$ 200,000	1,300,000
Advertising expense		$ 100,000	100,000	100,000
Minimum
Market Concentrations and Credit Risk [Line Items]
Property and equipment estimated useful life		3 years
Typical payment period for customers	30 days
Maximum
Market Concentrations and Credit Risk [Line Items]
Property and equipment estimated useful life		7 years
Typical payment period for customers	60 days
Patents
Market Concentrations and Credit Risk [Line Items]
impairment of indefinite useful lives intangible		$ 0	$ 800,000	$ 0