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Significant Accounting Policies - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2025	Jul. 31, 2024	Apr. 30, 2025
Accounting Policies [Abstract]
Net income (loss)	$ (466)	$ 1,313
Retained earnings (accumulated deficit)	(80,358)		$ (79,892)
Working capital deficit	(1,700)
Cash and cash equivalents	10,325		$ 9,785
Income tax expense (benefit)	$ 14	$ 21

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Amount of cash and cash equivalent. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate.

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