Fair Value Measurements - Additional Information (Detail) - USD ($) |
3 Months Ended | 12 Months Ended |
|---|---|---|
Apr. 30, 2023 |
Jan. 31, 2023 |
|
| Fair Value Measurements Disclosure [Line Items] | ||
| Assets transferred between fair value hierarchy categories | $ 0 | $ 0 |
| Fair Value, Recurring [Member] | ||
| Fair Value Measurements Disclosure [Line Items] | ||
| Cash equivalents | 2,399,000 | 2,389,000 |
| Liabilities measured at fair value | 0 | 0 |
| Fair Value, Recurring [Member] | US Treasury Securities [Member] | ||
| Fair Value Measurements Disclosure [Line Items] | ||
| Cash equivalents | 2,400,000 | 2,400,000 |
| Level 1 [Member] | Fair Value, Recurring [Member] | ||
| Fair Value Measurements Disclosure [Line Items] | ||
| Cash equivalents | $ 2,399,000 | $ 2,389,000 |
| X | ||||||||||
- Definition Fair Value Measurements Disclosure [Line Items] No definition available.
|
| X | ||||||||||
- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. No definition available.
|
| X | ||||||||||
- Definition Amount of transfer of financial instrument classified as an asset into (out of) level 3 of the fair value hierarchy. No definition available.
|
| X | ||||||||||
- Definition Fair value of financial and nonfinancial obligations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|