Stockholders' equity - Additional information (Detail) |
Sep. 30, 2020
USD ($)
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|---|---|
| Class of Stock [Line Items] | |
| Unrecognised share based compensation expense | $ 119,000 |
| 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 | ||||||||||
- Definition Amount of cost not yet recognized for nonvested award under share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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