Equity Transactions - Additional Information (Detail) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Sep. 30, 2021 |
Sep. 30, 2020 |
Sep. 30, 2021 |
Sep. 30, 2020 |
Apr. 30, 2021 |
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| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | |||||
| Non-cash stock-based compensation expense related to additional paid-in capital | $ 0.1 | $ 0.1 | $ 0.2 | $ 0.3 | |
| Common Class A [Member] | |||||
| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | |||||
| Shares authorized for sales and issuance | $ 15.0 | ||||
| X | ||||||||||
- Definition Common stock, value of shares authorized for issuance. No definition available.
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| X | ||||||||||
- Definition Amount of increase (decrease) to additional paid-in capital (APIC) for recognition and exercise of award under share-based payment arrangement. No definition available.
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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| X | ||||||||||
- Details
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