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Summary of Significant Accounting Policies - Additional Information (Detail)
3 Months Ended 9 Months Ended
Oct. 12, 2022
Oct. 11, 2022
Sep. 30, 2022
USD ($)
Sep. 30, 2021
USD ($)
Sep. 30, 2022
USD ($)
Segment
Sep. 30, 2021
USD ($)
Dec. 31, 2021
USD ($)
Product Information [Line Items]              
Stock split, conversion ratio         0.02    
Reverse stock split description         the changes in the number of shares resulting from the 50 to 1 reverse stock split that was approved by shareholders on October 11, 2022 and became effective as of October 12, 2022.    
Number of operating segments | Segment         1    
Total revenue     $ 3,677,000 $ 7,428,000 $ 16,822,000 $ 21,078,000  
Outstanding receivable     1,578,000   1,578,000   $ 5,134,000
Marketable securities     0   $ 0   9,996,000
Remaining performance obligation, expected timing of satisfaction         The Company expects to recognize 86% of this amount as revenue within one year and the remainder within fifteen months.    
Contract assets             0
Contract liabilities     $ 200,000   $ 200,000   500,000
Revenue recognized relating to contract liabilities         $ 400,000    
Accounting Standards Update 2020-06 [Member]              
Product Information [Line Items]              
Change in accounting principle, accounting standards update, adopted     true   true    
Change in accounting principle, accounting standards update, adoption date     Jan. 01, 2022   Jan. 01, 2022    
Change in accounting principle, accounting standards update, immaterial effect     true   true    
Accounting Standards Update 2021-04 [Member]              
Product Information [Line Items]              
Change in accounting principle, accounting standards update, adopted     true   true    
Change in accounting principle, accounting standards update, adoption date     Jan. 01, 2022   Jan. 01, 2022    
Change in accounting principle, accounting standards update, immaterial effect     true   true    
Accounting Standards Update 2021-10 [Member]              
Product Information [Line Items]              
Change in accounting principle, accounting standards update, adopted     true   true    
Change in accounting principle, accounting standards update, adoption date     Jan. 01, 2022   Jan. 01, 2022    
Change in accounting principle, accounting standards update, immaterial effect     true   true    
Other Non-Current Assets [Member]              
Product Information [Line Items]              
Contract assets     $ 100,000   $ 100,000    
Prepaid and Other Current Assets [Member]              
Product Information [Line Items]              
Costs to obtain or fulfill contract capitalized             100,000
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    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period     15 months   15 months    
Maximum [Member] | Other Non-Current Assets [Member]              
Product Information [Line Items]              
Costs to obtain or fulfill contract capitalized             100,000
Maximum [Member] | Prepaid and Other Current Assets [Member]              
Product Information [Line Items]              
Costs to obtain or fulfill contract capitalized     $ 100,000   $ 100,000    
Non-US [Member]              
Product Information [Line Items]              
Total revenue     1,200,000 $ 600,000 3,200,000 $ 1,600,000  
Outstanding receivable     $ 900,000   $ 900,000   $ 600,000
Revenue [Member] | Geographic Concentration Risk [Member] | Non-US [Member]              
Product Information [Line Items]              
Total revenue (as a percent)     32.00% 9.00% 19.00% 8.00%  
Revenue [Member] | Geographic Concentration Risk [Member] | Non-US [Member] | Maximum [Member]              
Product Information [Line Items]              
Total revenue (as a percent)     12.00% 10.00% 10.00% 10.00%  
Subsequent Event [Member]              
Product Information [Line Items]              
Stock split, conversion ratio 0.02 0.02          
Reverse stock split description On October 12, 2022, we effected a reverse stock split at the ratio of 1 post-split share for every 50 pre-split shares. All common stock amounts and references have been retroactively adjusted for all figures presented to reflect this split unless specifically stated otherwise On October 11, 2022, at the Company’s annual meeting of stockholders, the Company’s stockholders approved an amendment to the Company’s restated certificate of incorporation to effect a reverse stock split of the Company’s common stock. Following the receipt of the stockholders’ approval, the Company’s board of directors approved the reverse stock split at the ratio of 1 post-split share for every 50 pre-split shares, which was effective as of October 12, 2022. On October 31, 2022, the Company received a letter from Nasdaq informing the Company that it has regained compliance with the Bid Price Rule.