Stock-Based Payments - Narrative (Details) $ / shares in Units, $ in Thousands	3 Months Ended			6 Months Ended		31 Months Ended
	Oct. 31, 2025 USD ($) $ / shares shares	Jul. 31, 2025 shares	Oct. 31, 2024 USD ($) $ / shares	Oct. 31, 2025 USD ($) $ / shares shares	Oct. 31, 2024 USD ($) $ / shares	Oct. 31, 2025 USD ($) $ / shares shares	Apr. 30, 2025 shares	Mar. 29, 2023 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense | $	$ 249		$ 9	$ 457	$ 267
Weighted-average grant date fair value (in dollars per share) | $ / shares	$ 0.00		$ 2.48	$ 4.33	$ 2.49
Share repurchase program, authorized amount | $								$ 5,000
Treasury stock (in shares) | shares						120,300
Treasury stock average price (in dollars per share) | $ / shares						$ 5.73
Treasury stock approximate value | $						$ 708
Remaining repurchase amount | $	$ 4,300			$ 4,300		$ 4,300
2021 And 2010 Equity Incentive Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted outstanding (in shares) | shares	2,420,026			2,420,026		2,420,026	1,678,682
Granted (in shares) | shares				874,000
Unrecognized stock-based compensation expense | $	$ 3,800			$ 3,800		$ 3,800
Forfeited (in shares) | shares				15,125
2021 And 2010 Equity Incentive Plans | Time-based awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock-based compensation expense | $	1,200			$ 1,200		1,200
Weighted average recognition period (in years)				3 years 7 months 9 days
2021 And 2010 Equity Incentive Plans | Market based awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock-based compensation expense | $	888			$ 888		888
Weighted average recognition period (in years)				2 years 2 months 12 days
2021 And 2010 Equity Incentive Plans | Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock-based compensation expense | $	$ 1,700			$ 1,700		$ 1,700
2021 And 2010 Equity Incentive Plans | Performance Shares | Subject to Forfeiture
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Forfeited (in shares) | shares				430,000
2023 Global Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration term of awards				10 years
Options granted outstanding (in shares) | shares	300			300		300	0
Weighted-average grant date fair value (in dollars per share) | $ / shares				$ 1,364
Granted (in shares) | shares	0	0		300
2023 Global Equity Incentive Plan | Time-based awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock-based compensation expense | $	$ 348			$ 348		$ 348
Weighted average recognition period (in years)				2 years 6 months 18 days
2023 Global Equity Incentive Plan | Share-Based Payment Arrangement, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage				25.00%
2023 Global Equity Incentive Plan | Share-Based Payment Arrangement, Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage				6.25%
2023 Global Equity Incentive Plan | Share-Based Payment Arrangement, After Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period				3 years
Equity Incentive Plan 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant (in shares) | shares	355,000			355,000		355,000
Expiration term of awards				10 years
Strike price as a percent of fair market value				1
Equity Incentive Plan 2021 | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant (in shares) | shares	2,000,000			2,000,000		2,000,000
Equity Incentive Plan 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration term of awards				10 years
Strike price as a percent of fair market value				1
Options granted outstanding (in shares) | shares	787,000			787,000		787,000
Equity Incentive Plan 2010 | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant (in shares) | shares	30,000,000			30,000,000		30,000,000
Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense | $	$ 32		$ 3	$ 64	$ 7
Research and development | 2023 Global Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense | $	$ 31,000			$ 61