The Company, Business Activities and Basis of Presentation - Additional Information (Detail)		3 Months Ended		6 Months Ended
	Sep. 03, 2020 shares	Jun. 30, 2021 USD ($) shares	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) shares	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($) shares
The Company Business Activities And Basis Of Presentation [Line Items]
Stockholders equity reverse stock split ratio	0.1
Common stock, shares authorized | shares	150,000,000	150,000,000		150,000,000		150,000,000
Description of reverse stock split				On September 3, 2020, pursuant to the approval of the Company’s board of directors, the Company filed a Certificate of Amendment to its Amended and Restated Certificate of Incorporation to effect a reverse stock split of the Company’s outstanding common stock using a ratio of one-for-ten.
Net revenues		$ 12,047,166	$ 917,471	$ 29,803,356	$ 2,364,020
Additional reserves related to aged account receivable		1,100,000
Unbilled accounts receivables		4,300,000		4,300,000		$ 4,500,000
Commercial Test Revenue [Member]
The Company Business Activities And Basis Of Presentation [Line Items]
Net revenues		12,000,000.0		29,600,000
Commercial Test Revenue [Member] | RT-PCR COVID-19 Testing [Member]
The Company Business Activities And Basis Of Presentation [Line Items]
Net revenues		$ 12,100,000		$ 29,000,000.0
ASC 606 [Member]
The Company Business Activities And Basis Of Presentation [Line Items]
Performance obligation, description of timing				The duration of time between accession receipt and delivery of a valid assay result to the ordering physician or entity is typically less than two weeks, and for our RT-PCR COVID-19 testing, typically 48 hours or less.
Practical expedient, description				The Company does not adjust the transaction price for the effects of a significant financing component, as at contract inception, the Company expects the collection cycle to be one year or less.
ASC 606 [Member] | Maximum [Member] | Sales and Marketing Expenses [Member]
The Company Business Activities And Basis Of Presentation [Line Items]
Amortization period				1 year