UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	Non-Controlling Interest	Accumulated Deficit
Beginning balance (in shares) at Apr. 30, 2025		13,897,503
Beginning balance at Apr. 30, 2025	$ 3,772	$ 14	$ (708)	$ 84,358	$ 0	$ (79,892)
Beginning balance (in shares) at Apr. 30, 2025			120,333
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	208			178	30
Issuance of common stock on exercise of stock options (in shares)		11,251
Issuance of common stock on exercise of stock options	24			24
Net loss	(466)					(466)
Ending balance (in shares) at Jul. 31, 2025		13,908,754
Ending balance at Jul. 31, 2025	$ 3,538	$ 14	$ (708)	84,560	30	(80,358)
Ending balance (in shares) at Jul. 31, 2025			120,333
Beginning balance (in shares) at Apr. 30, 2026	13,886,826	14,007,159
Beginning balance at Apr. 30, 2026	$ 4,068	$ 14	$ (708)	85,700	129	(81,067)
Beginning balance (in shares) at Apr. 30, 2026			120,333
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	766			328	438
Issuance of common stock on exercise of stock options (in shares)		31,743
Issuance of common stock on exercise of stock options	52			52
Net loss	$ (426)					(426)
Ending balance (in shares) at Jul. 31, 2026	13,918,569	14,038,902
Ending balance at Jul. 31, 2026	$ 4,460	$ 14	$ (708)	$ 86,080	$ 567	$ (81,493)
Ending balance (in shares) at Jul. 31, 2026			120,333