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Stock Options and Stock-Based Compensation - Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended		3 Months Ended		9 Months Ended
	Jun. 30, 2025	Aug. 31, 2023	Jan. 31, 2026	Jan. 31, 2025	Jan. 31, 2026	Jan. 31, 2025
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Director's fees paid with shares of common stock in lieu of cash					$ 218
2017 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future issuance (in shares)		168,791
2017 Plan \| Restricted Stock Units (RSUs) \| Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for issuance (in shares)		64,633
2023 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future issuance (in shares)			290,636		290,636
2023 Plan \| Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	3 years
Stock-based compensation expense			$ 521	$ 381	$ 1,406	$ 1,071
Remaining estimated compensation expense			$ 2,797		$ 2,797
2023 Plan \| Restricted Stock Units (RSUs) \| Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units granted (in shares)	72,728
Shares available for issuance (in shares)		374,633
Increase in number of shares reserved for issuance (in shares)		310,000