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Significant Accounting Policies - Additional Information (Details)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Oct. 30, 2019
USD ($)
Device
Patient
Oct. 30, 2019
CAD ($)
Device
Patient
Jun. 30, 2020
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2019
USD ($)
Dec. 31, 2020
USD ($)
Device
Lease
Segment
shares
Dec. 31, 2020
CAD ($)
Device
Segment
shares
Dec. 31, 2019
USD ($)
Agreement
shares
Oct. 30, 2019
CAD ($)
Jan. 01, 2019
USD ($)
Dec. 31, 2018
USD ($)
Schedule Of Significant Accounting Policies [Line Items]                      
Accounts receivable           $ 74,000   $ 210,000      
Allowance for doubtful accounts           400,000   200,000      
Rent deposits receivable           18,000          
Refunds from research and development tax credits               1,000     $ 200,000
Inventory markdowns to net realizable value           205,000   50,000      
Depreciation expense           119,000   127,000      
Amortization expense related to intangible assets           363,000   64,000      
Proceeds from sale of property and equipment           61,000          
Selling, general and administrative           9,714,000   16,521,000      
Fair value measurement adjustments           400,000          
Business acquisition, goodwill not expected tax deductible amount           700,000          
Revenue           661,000   1,496,000      
Intangible asset impairment           184,000          
Operating lease ROU asset           90,000   552,000   $ 700,000  
Operating lease liabilities           $ 91,000   $ 637,000   $ 700,000  
Leases, initial term           12 months          
Number of operating lease | Lease           1          
Number of operating segment | Segment           1 1        
Number of reportable segment | Segment           1 1        
Intangible asset impairment loss           $ 184,000          
Intangible asset, net           $ 527,000          
Dilutive common stock equivalents excluded from the computation of diluted weighted average shares outstanding | shares           455,631 455,631 186,764      
ASU 2018-13                      
Schedule Of Significant Accounting Policies [Line Items]                      
Change in accounting principle, accounting standards update, adopted [true false]           true          
Change in accounting principle, accounting standards update, adoption date           Jan. 01, 2020          
Change in accounting principle, accounting standards update, immaterial effect [true false]           true          
ASU 2018-18                      
Schedule Of Significant Accounting Policies [Line Items]                      
Change in accounting principle, accounting standards update, adopted [true false]           true          
Change in accounting principle, accounting standards update, adoption date           Jan. 01, 2020          
Change in accounting principle, accounting standards update, immaterial effect [true false]           true          
ASU 2020-06                      
Schedule Of Significant Accounting Policies [Line Items]                      
Change in accounting principle, accounting standards update, adopted [true false]           true          
Change in accounting principle, accounting standards update, adoption date           Jan. 01, 2021          
Change in accounting principle, accounting standards update, immaterial effect [true false]           true          
Change in accounting principle, accounting standards update, early adoption [true false]           true          
Outstanding Stock Options                      
Schedule Of Significant Accounting Policies [Line Items]                      
Incremental common stock equivalents | shares           0 0 0      
Warrants                      
Schedule Of Significant Accounting Policies [Line Items]                      
Incremental common stock equivalents | shares           0 0 0      
Restricted Stock Units                      
Schedule Of Significant Accounting Policies [Line Items]                      
Incremental common stock equivalents | shares           0 0 0      
Fee Revenue                      
Schedule Of Significant Accounting Policies [Line Items]                      
Revenue           $ 9,000   $ 37,000      
License Revenue                      
Schedule Of Significant Accounting Policies [Line Items]                      
Revenue           $ 27,000   5,000      
Customer Relationships                      
Schedule Of Significant Accounting Policies [Line Items]                      
Intangible asset useful life           1 year 3 months 1 year 3 months        
Intangible asset amortization method           straight-line straight-line        
Customer Relationships | Fair Value, Inputs, Level 3                      
Schedule Of Significant Accounting Policies [Line Items]                      
Intangible asset impairment           $ 200,000          
Intangible asset impairment loss           200,000          
Intangible asset, net           $ 9,000          
Proprietary Technology                      
Schedule Of Significant Accounting Policies [Line Items]                      
Intangible asset useful life           5 years 5 years        
Intangible asset amortization method           straight-line straight-line        
Reacquired Rights                      
Schedule Of Significant Accounting Policies [Line Items]                      
Intangible asset useful life           3 years 10 months 13 days 3 years 10 months 13 days        
Intangible asset amortization method           straight-line straight-line        
Heuro Canada Incorporation                      
Schedule Of Significant Accounting Policies [Line Items]                      
Goodwill impairment loss recognized           $ 0          
Heuro Canada Incorporation | Selling, General and Administrative Expenses                      
Schedule Of Significant Accounting Policies [Line Items]                      
Amortization expense related to intangible assets           400,000   100,000      
Acquisition related costs               100,000      
Heuro Canada Incorporation | Selling, General and Administrative Expenses | Customer Relationships                      
Schedule Of Significant Accounting Policies [Line Items]                      
Intangible asset impairment           200,000          
Intangible asset impairment loss           200,000          
HealthTech Connex, Inc.                      
Schedule Of Significant Accounting Policies [Line Items]                      
Deferred revenue           300,000          
HealthTech Connex, Inc. | Neurocatch Device                      
Schedule Of Significant Accounting Policies [Line Items]                      
Cost of goods sold per device         $ 600,000            
HealthTech Connex, Inc. | Fee Revenue | Heuro Canada Incorporation                      
Schedule Of Significant Accounting Policies [Line Items]                      
Revenue       $ 9,000       $ 37,000      
Percentage of franchise fee revenue         50.00%            
Number of franchise agreements | Agreement               3      
HealthTech Connex, Inc. | Strategic Alliance Agreement | Heuro Canada Incorporation                      
Schedule Of Significant Accounting Policies [Line Items]                      
Current receivables           100,000   $ 200,000      
Contract assets           0   0      
Contract liabilities           0   0      
HealthTech Connex, Inc. | Strategic Alliance Agreement | Neurocatch Device                      
Schedule Of Significant Accounting Policies [Line Items]                      
Revenue           630,000   1,500,000      
HealthTech Connex, Inc. | Strategic Alliance Agreement | Services Performed Using Neurocatch Device                      
Schedule Of Significant Accounting Policies [Line Items]                      
Revenue               11,000      
HealthTech Connex, Inc. | Clinical Research and Co-Promotion Agreement                      
Schedule Of Significant Accounting Policies [Line Items]                      
Revenue           $ 27,000   5,000      
Number of patients to collect data | Patient 200 200                  
Initial term of exclusive right 10 years 10 years                  
Additional renewal term of exclusive right 10 years 10 years                  
Written notice period for additional renewal term 60 days 60 days                  
Acquisition date fair value   $ 360                  
License revenue agreement term           10 years 10 years        
HealthTech Connex, Inc. | Clinical Research and Co-Promotion Agreement | License Revenue                      
Schedule Of Significant Accounting Policies [Line Items]                      
Deferred revenue           $ 200,000          
HealthTech Connex, Inc. | Heuro Canada Incorporation | Share Purchase Agreement                      
Schedule Of Significant Accounting Policies [Line Items]                      
Total consideration amount $ 1,600,000 2,100                  
Cash 400,000 $ 500                  
HealthTech Connex, Inc. | Heuro Canada Incorporation | Strategic Alliance Agreement                      
Schedule Of Significant Accounting Policies [Line Items]                      
Potential amount receivable $ 500,000               $ 750    
Minimum                      
Schedule Of Significant Accounting Policies [Line Items]                      
Effective income tax rate           50.00% 50.00%        
Leasehold Improvements                      
Schedule Of Significant Accounting Policies [Line Items]                      
Estimated useful life           5 years 5 years        
Sale of property with a net book value     $ 53,000                
Furniture and Fixtures                      
Schedule Of Significant Accounting Policies [Line Items]                      
Estimated useful life           7 years 7 years        
Sale of property with a net book value     118,000                
Proceeds from sale of property and equipment     61,000                
Computer Software and Hardware | Minimum                      
Schedule Of Significant Accounting Policies [Line Items]                      
Estimated useful life           3 years 3 years        
Computer Software and Hardware | Maximum                      
Schedule Of Significant Accounting Policies [Line Items]                      
Estimated useful life           5 years 5 years        
Equipment                      
Schedule Of Significant Accounting Policies [Line Items]                      
Estimated useful life           15 years 15 years        
Software                      
Schedule Of Significant Accounting Policies [Line Items]                      
Estimated useful life           3 years 3 years        
Amortization expense related to intangible assets               17,000      
Furniture and Fixtures and Leasehold Improvements                      
Schedule Of Significant Accounting Policies [Line Items]                      
Selling, general and administrative     $ 110,000                
PoNS                      
Schedule Of Significant Accounting Policies [Line Items]                      
Number of devices resulting in recognition of revenue | Device           21 21        
Number of devices recorded as deferred revenue | Device           34 34        
PoNS | Heuro Canada Incorporation                      
Schedule Of Significant Accounting Policies [Line Items]                      
Revenue           $ 100,000          
PoNS | HealthTech Connex, Inc.                      
Schedule Of Significant Accounting Policies [Line Items]                      
Number of devices recorded as deferred revenue | Device           34 34        
PoNS | HealthTech Connex, Inc. | Share Purchase Agreement                      
Schedule Of Significant Accounting Policies [Line Items]                      
Number of devices | Device           55 55        
Revenue             $ 500        
PoNS | HealthTech Connex, Inc. | Heuro Canada Incorporation                      
Schedule Of Significant Accounting Policies [Line Items]                      
Number of devices resulting in recognition of revenue | Device           21 21        
PoNS | HealthTech Connex, Inc. | Heuro Canada Incorporation | Share Purchase Agreement                      
Schedule Of Significant Accounting Policies [Line Items]                      
Number of devices | Device 55 55                  
Fair value of PoNS $ 400,000               500    
Quebec                      
Schedule Of Significant Accounting Policies [Line Items]                      
Other receivables refunds related to goods, services and sales tax.               100,000      
British Columbia | PoNS | HealthTech Connex, Inc. | Heuro Canada Incorporation | Co-Promotion Agreement                      
Schedule Of Significant Accounting Policies [Line Items]                      
Fair value of PoNS $ 300,000               $ 400    
Revenue from Product Sales                      
Schedule Of Significant Accounting Policies [Line Items]                      
Accounts receivable           $ 100,000   $ 200,000      
Revenue from Product Sales | Heuro Canada Incorporation                      
Schedule Of Significant Accounting Policies [Line Items]                      
Revenue           $ 630,000