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v3.22.1

Common Stock - Stock Options - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Common shares reserved for options currently outstanding | 789,940 |  | 522,090
Number of shares granted | 267,850 |  |
Unrecognized compensation expense related to stock options granted | $ 4.6 |  |
Anti-dilutive securities excluded from earning per share computation | 2,309,387 | 1,778,596 |
Warrant [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Anti-dilutive securities excluded from earning per share computation | 1,239,947 |  |
Stock Options [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Anti-dilutive securities excluded from earning per share computation | 789,940 |  |
Restricted Stock Unit [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Anti-dilutive securities excluded from earning per share computation | 279,500 |  |
Stock Options [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Weighted-average period, restricted stock awards | 2 years 6 months 25 days |  |
Stock Options [Member] | Employees and Consultants [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Award vesting period | 4 years |  |
Stock Options [Member] | Minimum [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Award expiration period | 7 years |  |
Stock Options [Member] | Minimum [Member] | Board of Directors [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Award vesting period | 1 year |  |
Stock Options [Member] | Maximum [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Award expiration period | 10 years |  |
Stock Options [Member] | Maximum [Member] | Board of Directors [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Award vesting period | 3 years |  |
Restricted Stock Unit [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Restricted shares reserved for issuance under incentive plan | 279,500 |  |
Award vesting period | 4 years |  |
Common shares reserved for awards currently outstanding | 279,500 |  | 53,250
Weighted-average period, restricted stock awards | 1 year 6 months 21 days |  |
2018 Equity Incentive Plan [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Common shares reserved for issuance under incentive plan | 17,722 |  |
Award expiration period | 10 years |  |
2018 Equity Incentive Plan [Member] | Minimum [Member] | Employees and Consultants [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Award vesting period | 3 years |  |
2018 Equity Incentive Plan [Member] | Minimum [Member] | Board of Directors [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Award vesting period | 1 year |  |
2018 Equity Incentive Plan [Member] | Maximum [Member] | Employees and Consultants [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Award vesting period | 4 years |  |
2018 Equity Incentive Plan [Member] | Maximum [Member] | Board of Directors [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Award vesting period | 3 years |  |
2018 Equity Incentive Plan [Member] | Stock Options [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Common shares reserved for issuance under incentive plan | 993,777 |  |
Common shares reserved for options currently outstanding | 696,555 |  |
New Employee Inducement Grants [Member] | Stock Options [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Common shares reserved for options currently outstanding | 80,000 |  |
Award expiration period | 10 years |  |
Number of shares granted | 35,000 |  |
2017 Equity Incentive Plan [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Award expiration period | 10 years |  |
2017 Equity Incentive Plan [Member] | Minimum [Member] | Employees and Consultants [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Award vesting period | 3 years |  |
2017 Equity Incentive Plan [Member] | Minimum [Member] | Board of Directors [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Award vesting period | 1 year |  |
2017 Equity Incentive Plan [Member] | Maximum [Member] | Employees and Consultants [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Award vesting period | 4 years |  |
2017 Equity Incentive Plan [Member] | Maximum [Member] | Board of Directors [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Award vesting period | 3 years |  |
2017 Equity Incentive Plan [Member] | Stock Options [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Common shares reserved for issuance under incentive plan | 13,156 |  |
2010 Performance Incentive Plan [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Award expiration period | 10 years |  |
2010 Performance Incentive Plan [Member] | Minimum [Member] | Employees and Consultants [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Award vesting period | 3 years |  |
2010 Performance Incentive Plan [Member] | Minimum [Member] | Board of Directors [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Award vesting period | 1 year |  |
2010 Performance Incentive Plan [Member] | Maximum [Member] | Employees and Consultants [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Award vesting period | 4 years |  |
2010 Performance Incentive Plan [Member] | Maximum [Member] | Board of Directors [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Award vesting period | 3 years |  |
2010 Performance Incentive Plan [Member] | Stock Options [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Common shares reserved for issuance under incentive plan | 229 |  |
Common shares reserved for options currently outstanding | 229 |  |
2010 Performance Incentive Plan [Member] | Restricted Stock Unit [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Common shares reserved for awards currently outstanding | 0 |  |

X
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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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