NOTES PAYABLE - Company's Financing Arrangements (Details) - USD ($)	3 Months Ended	6 Months Ended
Oct. 31, 2021	Oct. 31, 2021	Apr. 30, 2021
Line of Credit Facility [Line Items]
Outstanding Principal Amount	$ 6,002,000	$ 6,002,000	$ 3,482,000
Revolving Line of Credit
Line of Credit Facility [Line Items]
Principal Amount Available for Borrowing	3,750,000	3,750,000
Outstanding Principal Amount	0	0	0
Principal Repayments	$ 0	$ 0
Interest Rate	3.75%	3.75%
Mortgaged Property Book Value	$ 1,693,000	$ 1,693,000
Capitalized Interest and Fees	0	0
Lomas Encantadas U2B P3
Line of Credit Facility [Line Items]
Principal Amount Available for Borrowing	632,000	632,000
Outstanding Principal Amount	0	0	410,000
Principal Repayments	$ 0	$ 1,770,000
Interest Rate	3.75%	3.75%
Mortgaged Property Book Value	$ 877,000	$ 877,000
Capitalized Interest and Fees	0	0
Hawk Site U37
Line of Credit Facility [Line Items]
Principal Amount Available for Borrowing	0	0
Outstanding Principal Amount	0	0	0
Principal Repayments	0	0
Hawk Site U23 U40
Line of Credit Facility [Line Items]
Principal Amount Available for Borrowing	1,678,000	1,678,000
Outstanding Principal Amount	0	0	30,000
Principal Repayments	$ 30,000	$ 30,000
Interest Rate	3.75%	3.75%
Mortgaged Property Book Value	$ 1,359,000	$ 1,359,000
Capitalized Interest and Fees	0	0
Lavender Fields - acquisition
Line of Credit Facility [Line Items]
Principal Amount Available for Borrowing	0	0
Outstanding Principal Amount	0	0	1,749,000
Principal Repayments	0	1,703,000
Decrease in outstanding principal amount		45,000
Lavender Fields - development
Line of Credit Facility [Line Items]
Principal Amount Available for Borrowing	2,194,000	2,194,000
Outstanding Principal Amount	504,000	504,000	1,293,000
Principal Repayments	$ 395,000	$ 789,000
Interest Rate	3.75%	3.75%
Mortgaged Property Book Value	$ 5,261,000	$ 5,261,000
Capitalized Interest and Fees	6,000	17,000
La Mirada
Line of Credit Facility [Line Items]
Principal Amount Available for Borrowing	1,877,000	1,877,000
Outstanding Principal Amount	5,498,000	5,498,000	$ 0
Principal Repayments	$ 0	$ 0
Interest Rate	3.75%	3.75%
Mortgaged Property Book Value	$ 8,041,000	$ 8,041,000
Capitalized Interest and Fees	$ 40,000	$ 61,000

Represents the amount of mortgaged property book value.

No definition available.

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- Definition

Amount of interest capitalized during the period.

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-Publisher FASB
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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

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- Definition

Amount of increase (decrease) of the credit facility.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

The effective interest rate at the end of the reporting period.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

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- Definition

Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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