UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY (DEFICIENCY) - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	Non-Controlling Interest	Accumulated Deficit
Beginning balance (in shares) at Apr. 30, 2024		13,714,099
Beginning balance at Apr. 30, 2024	$ (1,903)	$ 14	$ (708)	$ 83,384		$ (84,593)
Beginning balance (in shares) at Apr. 30, 2024			120,333
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	258			258
Net income (loss)	1,313					1,313
Ending balance (in shares) at Jul. 31, 2024		13,714,099
Ending balance at Jul. 31, 2024	(332)	$ 14	$ (708)	83,642		(83,280)
Ending balance (in shares) at Jul. 31, 2024			120,333
Beginning balance (in shares) at Apr. 30, 2024		13,714,099
Beginning balance at Apr. 30, 2024	(1,903)	$ 14	$ (708)	83,384		(84,593)
Beginning balance (in shares) at Apr. 30, 2024			120,333
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	2,041
Ending balance (in shares) at Oct. 31, 2024		13,819,236
Ending balance at Oct. 31, 2024	681	$ 14	$ (708)	83,927		(82,552)
Ending balance (in shares) at Oct. 31, 2024			120,333
Beginning balance (in shares) at Jul. 31, 2024		13,714,099
Beginning balance at Jul. 31, 2024	(332)	$ 14	$ (708)	83,642		(83,280)
Beginning balance (in shares) at Jul. 31, 2024			120,333
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	9			9
Issuance of common stock on exercise of stock options (in shares)		105,137
Issuance of common stock on exercise of stock options	276			276
Net income (loss)	728					728
Ending balance (in shares) at Oct. 31, 2024		13,819,236
Ending balance at Oct. 31, 2024	$ 681	$ 14	$ (708)	83,927		(82,552)
Ending balance (in shares) at Oct. 31, 2024			120,333
Beginning balance (in shares) at Apr. 30, 2025	13,777,170	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 income (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, 2025	13,777,170	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]
Net income (loss)	$ (230)
Ending balance (in shares) at Oct. 31, 2025	13,886,326	14,006,659
Ending balance at Oct. 31, 2025	$ 4,231	$ 14	$ (708)	84,985	61	(80,121)
Ending balance (in shares) at Oct. 31, 2025			120,333
Beginning balance (in shares) at Jul. 31, 2025		13,908,754
Beginning balance at Jul. 31, 2025	3,538	$ 14	$ (708)	84,560	30	(80,358)
Beginning balance (in shares) at Jul. 31, 2025			120,333
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	249			218	31
Issuance of common stock on exercise of stock options (in shares)		97,905
Issuance of common stock on exercise of stock options	207			207
Net income (loss)	237
Net income (loss)	$ 237					237
Ending balance (in shares) at Oct. 31, 2025	13,886,326	14,006,659
Ending balance at Oct. 31, 2025	$ 4,231	$ 14	$ (708)	$ 84,985	$ 61	$ (80,121)
Ending balance (in shares) at Oct. 31, 2025			120,333