Significant Accounting Policies - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Oct. 31, 2025	Jul. 31, 2025	Oct. 31, 2024	Jul. 31, 2024	Oct. 31, 2025	Oct. 31, 2024	Apr. 30, 2025
Accounting Policies [Abstract]
Net income (loss)	$ 237	$ (466)	$ 728	$ 1,313	$ (230)	$ 2,041
Retained earnings (accumulated deficit)	(80,121)				(80,121)		$ (79,892)
Working capital deficit	(809)				(809)
Cash and cash equivalents	8,516				8,516		$ 9,785
Income tax expense (benefit)	$ 18		$ 11		$ 33	$ 31