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Summary of Significant Accounting Policies - Additional Information (Details) $ in Thousands |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Oct. 30, 2019 CAD ($) | Jun. 30, 2021 USD ($) Lease shares | Jun. 30, 2020 USD ($) shares | Jun. 30, 2021 USD ($) Lease Device Segment shares | Jun. 30, 2020 USD ($) Device shares | Dec. 31, 2020 USD ($)
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Accounts receivable |  | $ 51,000 |  | $ 51,000 |  | $ 74,000
Allowance for doubtful accounts |  | 400,000 |  | 400,000 |  | 400,000
Refunds from research and development tax credits |  | 1,000 |  | 1,000 |  | 1,000
Rent deposits receivable |  |  |  |  |  | 18,000
Inventory markdowns to net realizable value |  | 0 | $ 0 | 0 | $ 2,000 |
Depreciation expense |  | 28,000 | 29,000 | 56,000 | 67,000 |
Amortization expense related to intangible assets |  | $ 49,000 | 89,000 | $ 106,000 | 215,000 |
Intangible asset impairment loss |  |  |  |  | 181,000 |
Leases, initial term |  | 12 months |  | 12 months |  |
Number of operating lease | Lease |  | 1 |  | 1 |  |
Revenue |  | $ 71,000 | $ 133,000 | $ 155,000 | $ 339,000 |
Number of operating segment | Segment |  |  |  | 1 |  |
Number of reportable segment | Segment |  |  |  | 1 |  |
Common stock equivalents excluded from the computation of diluted weighted average shares outstanding | shares |  | 1,233,230 | 388,344 | 1,233,230 | 388,344 |
ASU 2020-06 |  |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Change in accounting principle, accounting standards update, adopted [true false] |  | true |  | true |  |
Change in accounting principle, accounting standards update, early adoption [true false] |  | true |  | true |  |
Change in accounting principle, accounting standards update, adoption date |  | Jan. 01, 2021 |  | Jan. 01, 2021 |  |
Change in accounting principle, accounting standards update, immaterial effect [true false] |  | true |  | true |  |
Outstanding Stock Options |  |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Incremental common stock equivalents | shares |  | 0 | 0 | 0 | 0 |
Warrants |  |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Incremental common stock equivalents | shares |  | 0 | 0 | 0 | 0 |
Restricted Stock Units |  |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Incremental common stock equivalents | shares |  | 0 | 0 | 0 | 0 |
Derivative Financial Instruments |  |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Warrants expiration date |  | Apr. 30, 2021 |  | Apr. 30, 2021 |  |
Fair value of derivative financial instruments |  |  |  |  |  | 0
HealthTech Connex, Inc. | Clinical Research and Co-Promotion Agreement |  |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Acquisition date fair value | $ 360 |  |  |  |  |
Agreement term at acquisition | 10 years |  |  |  |  |
License revenue agreement term |  |  |  | 10 years |  |
HealthTech Connex, Inc. | Strategic Alliance Agreement | Heuro Canada Incorporation |  |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Contract assets |  | $ 0 |  | $ 0 |  | 0
Contract liabilities |  | 0 |  | 0 |  | 0
Fee Revenue |  |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Revenue |  | 0 | $ 0 | 0 | $ 9,000 |
License Revenue |  |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Revenue |  | 8,000 | 7,000 | 15,000 | 13,000 |
License Revenue | HealthTech Connex, Inc. | Clinical Research and Co-Promotion Agreement |  |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Revenue |  | 8,000 | 7,000 | 15,000 | 13,000 |
Deferred revenue |  | 200,000 |  | 200,000 |  |
Customer Relationships |  |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Fully amortized finite-lived intangible assets written-off |  |  |  | 200,000 |  |
Customer Relationships | Level 3 |  |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Intangible asset impairment loss |  |  |  | 200,000 |  |
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 |  | 49,000 | 100,000 | $ 100,000 | 200,000 |
Heuro Canada Incorporation | Selling, General and Administrative Expenses | Customer Relationships |  |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Intangible asset impairment loss |  |  |  |  | 200,000 |
Minimum |  |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Effective income tax rate |  |  |  | 50.00% |  |
Leasehold Improvements |  |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Estimated useful life |  |  |  | 5 years |  |
Furniture and Fixtures |  |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Estimated useful life |  |  |  | 7 years |  |
Equipment |  |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Estimated useful life |  |  |  | 15 years |  |
Computer Software and Hardware | Minimum |  |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Estimated useful life |  |  |  | 3 years |  |
Computer Software and Hardware | Maximum |  |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Estimated useful life |  |  |  | 5 years |  |
PoNS |  |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Number of devices recorded as deferred revenue | Device |  |  |  | 34 |  |
Deferred revenue |  | 300,000 |  | $ 300,000 |  |
PoNS | Heuro Canada Incorporation |  |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Revenue |  |  |  |  | $ 100,000 |
Number of devices resulting in recognition of revenue | Device |  |  |  | 0 | 11 |
Number of devices | Device |  |  |  |  | 55 |
Quebec |  |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Other receivables refunds related to goods, services and sales tax |  | 200,000 |  | $ 200,000 |  | 100,000
Revenue from Product Sales |  |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Accounts receivable |  | 51,000 |  | 51,000 |  | $ 100,000
Revenue |  | $ 63,000 | $ 100,000 | $ 100,000 | $ 300,000 |

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