INFORMATION ABOUT THE COMPANY'S OPERATIONS IN DIFFERENT INDUSTRY SEGMENTS (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2021	Oct. 31, 2020	Apr. 30, 2021
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 16,236	$ 9,256	$ 26,743	$ 13,462
Net income (loss)	3,326	798	4,963	1,391
Provision (benefit) for income taxes	1,065	319	1,453	465
Interest income (expense), net	2	(12)	1	(6)
Depreciation	100	132	204	270
EBITDA (c)	4,493	1,237	6,621	2,120
Capital expenditures	10	0	11	3
Total assets	104,909	95,720	104,909	95,720	$ 97,366
Land Development
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	8,745	8,989	17,206	12,845
Net income (loss)	1,612	1,693	3,418	2,399
Provision (benefit) for income taxes	263	313	589	327
Interest income (expense), net	1	(13)	0	(11)
Depreciation	0	8	0	22
EBITDA (c)	1,876	2,001	4,007	2,737
Capital expenditures	0	0	0	0
Total assets	88,231	76,777	88,231	76,777
Homebuilding
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	689	202	2,639	202
Net income (loss)	12	(66)	190	(152)
Provision (benefit) for income taxes	1	(24)	37	(51)
Interest income (expense), net	0	0	0	0
Depreciation	0	0	0	0
EBITDA (c)	13	(90)	227	(203)
Capital expenditures	10	0	11	3
Total assets	3,357	1,494	3,357	1,494
Corporate
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	6,802	65	6,898	415
Net income (loss)	1,702	(829)	1,355	(856)
Provision (benefit) for income taxes	801	30	827	189
Interest income (expense), net	1	1	1	5
Depreciation	100	124	204	248
EBITDA (c)	2,604	(674)	2,387	(414)
Capital expenditures	0	0	0	0
Total assets	$ 13,321	$ 17,449	$ 13,321	$ 17,449