Summary of Significant Accounting Policies - Additional Information (Detail)		3 Months Ended								12 Months Ended
	Jan. 01, 2019 USD ($) lease_arrangement	Dec. 31, 2019 USD ($) Item	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($) Item	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2019 USD ($) Segment Item	Dec. 31, 2018 USD ($) Item	Dec. 31, 2017 USD ($)
Product Information [Line Items]
Number of operating segments | Segment										1
Total revenue		$ 3,069,000	$ 1,677,000	$ 1,804,000	$ 1,785,000	$ 1,792,000	$ 2,466,000	$ 3,931,000	$ 2,311,000	$ 8,335,000	$ 10,500,000	$ 4,666,000
Outstanding receivable		$ 2,825,000				$ 1,786,000				$ 2,825,000	$ 1,786,000
Number of financial institutions in which cash was deposited | Item		1				1				1	1
Aggregate amount of transaction price allocated to remaining performance obligations for contracts with original duration greater than one year		$ 200,000				$ 3,700,000				$ 200,000	$ 3,700,000
Remaining performance obligation, expected timing of satisfaction										The Company expects to recognize revenue on the remaining performance obligations over the next 2 years.
Contract assets		0				0				$ 0	0
Contract liabilities		200,000				600,000				200,000	$ 600,000
Revenue recognized relating to contract liabilities										600,000
Costs to obtain or fulfill contract capitalized		0								$ 0
Expected dividend yield										0.00%
US federal corporate tax rate										21.00%	21.00%	35.00%
Transition tax recognized										$ 0	$ 0
Operating lease liabilities		3,856,000								3,856,000
Right-of-use assets		3,360,000								3,360,000
Co Development Partnership Agreement [Member] | CARB-X [Member]
Product Information [Line Items]
Total revenue										$ 900,000	$ 1,100,000
Accounting Standards Update 2016-02 [Member]
Product Information [Line Items]
Maximum short-term lease exception period										12 months
Number of operating lease arrangements | lease_arrangement	8
Number of finance lease arrangements | lease_arrangement	2
Operating lease liabilities	$ 5,600,000
Right-of-use assets	4,800,000
Accrued rent liability	$ 800,000
Minimum [Member]
Product Information [Line Items]
Aggregate amount of transaction price allocated to remaining performance obligations, original duration										1 year	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	1 year
T2 Dx [Member]
Product Information [Line Items]
Maintenance Services period (in years)										1 year
Additional period for Maintenance Service option (in years)										1 year
Constrained Revenue [Member]
Product Information [Line Items]
Aggregate amount of transaction price allocated to remaining performance obligations for contracts with original duration greater than one year						3,000,000					$ 3,000,000
Instrument Rentals [Member]
Product Information [Line Items]
Total revenue										$ 184,000	523,000
Lease revenue										200,000
Contribution [Member]
Product Information [Line Items]
Total revenue		1,213,000	$ 444,000	$ 459,000	$ 329,000					2,445,000
Contribution [Member] | Co Development Partnership Agreement [Member] | Biomedical Advanced Research and Development Authority [Member]
Product Information [Line Items]
Total revenue										1,500,000
Non-US [Member]
Product Information [Line Items]
Total revenue										2,800,000	2,200,000	$ 900,000
Outstanding receivable		$ 1,200,000				$ 900,000				$ 1,200,000	$ 900,000
Revenue [Member] | Geographic Concentration Risk [Member] | Non-US [Member]
Product Information [Line Items]
Total revenue (as a percent)										34.00%	21.00%	19.00%
Revenue [Member] | Customer Concentration Risk [Member] | Customer One [Member]
Product Information [Line Items]
Total revenue (as a percent)										19.00%	29.00%	19.00%
Revenue [Member] | Customer Concentration Risk [Member] | Customer Two [Member]
Product Information [Line Items]
Total revenue (as a percent)										11.00%	15.00%	10.00%
Revenue [Member] | Customer Concentration Risk [Member] | Customer Three [Member]
Product Information [Line Items]
Total revenue (as a percent)										8.00%	10.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer One [Member]
Product Information [Line Items]
Total revenue (as a percent)										27.00%	25.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer Two [Member]
Product Information [Line Items]
Total revenue (as a percent)										10.00%	22.00%