Summary of Significant Accounting Policies - Additional Information (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) Segment	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Product Information [Line Items]
Number of operating segments | Segment			1
Total revenue	$ 2,552,000	$ 1,804,000	$ 5,097,000	$ 3,589,000
Outstanding receivable	1,300,000		1,300,000		$ 2,825,000
Other-than-temporary unrealized losses			0
Aggregate amount of transaction price allocated to remaining performance obligations for contracts with original duration greater than one year	100,000		$ 100,000
Remaining performance obligation, expected timing of satisfaction			The Company expects to recognize revenue on the remaining performance obligations over the next 18 months.
Contract assets	0		$ 0		0
Contract liabilities	100,000		100,000		200,000
Revenue recognized relating to contract liabilities			100,000
Costs to obtain or fulfill contract capitalized	0		$ 0
T2 Dx [Member]
Product Information [Line Items]
Maintenance Services period (in years)			1 year
Additional period for Maintenance Service option (in years)			1 year
Maximum [Member]
Product Information [Line Items]
Original expected period of contracts for which value of unsatisfied performance obligations not to be disclosed			1 year
Minimum [Member]
Product Information [Line Items]
Aggregate amount of transaction price allocated to remaining performance obligations, original duration			1 year
Non-US [Member]
Product Information [Line Items]
Total revenue	300,000	$ 600,000	$ 700,000	$ 1,200,000
Outstanding receivable	$ 300,000		$ 300,000		$ 1,200,000
Revenue [Member] | Geographic Concentration Risk [Member] | Non-US [Member]
Product Information [Line Items]
Total revenue (as a percent)	10.00%	31.00%	15.00%	34.00%
Revenue [Member] | Geographic Concentration Risk [Member] | Non-US [Member] | Maximum [Member]
Product Information [Line Items]
Total revenue (as a percent)	10.00%	10.00%	10.00%
Revenue [Member] | Geographic Concentration Risk [Member] | Non-US [Member] | Maximum [Member] | Customer One [Member]
Product Information [Line Items]
Total revenue (as a percent)				10.00%