FAIR VALUE MEASUREMENTS (Details) - USD ($) $ in Thousands	Jul. 31, 2018	Apr. 30, 2018
FINANCIAL LIABILITIES
Mortgages payable	$ 464,557	$ 509,919
Carrying Amount [Member]
FINANCIAL ASSETS
Cash and cash equivalents	16,261	11,891
FINANCIAL LIABILITIES
Other debt, including other debt related to assets held for sale	0	0
Revolving line of credit	130,000	124,000
Term loan	70,000	70,000
Mortgages payable	466,555	509,919
Fair Value [Member]
FINANCIAL ASSETS
Cash and cash equivalents	16,261	11,891
FINANCIAL LIABILITIES
Other debt, including other debt related to assets held for sale	0	0
Revolving line of credit	130,000	124,000
Term loan	70,000	70,000
Mortgages payable	465,445	510,803
Recurring [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative instrument - interest rate swap	1,987	1,779
Recurring [Member] \| Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative instrument - interest rate swap	0	0
Recurring [Member] \| Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative instrument - interest rate swap	1,987	1,779
Recurring [Member] \| Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative instrument - interest rate swap	$ 0	0
Nonrecurring [Member]
Fair Value Measurements on a Nonrecurring Basis [Abstract]
Real estate investments		52,145
Nonrecurring [Member] \| Level 1 [Member]
Fair Value Measurements on a Nonrecurring Basis [Abstract]
Real estate investments		0
Nonrecurring [Member] \| Level 2 [Member]
Fair Value Measurements on a Nonrecurring Basis [Abstract]
Real estate investments		0
Nonrecurring [Member] \| Level 3 [Member]
Fair Value Measurements on a Nonrecurring Basis [Abstract]
Real estate investments		$ 52,145

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This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents loan receivable as presented on the statement of financial position which may include investments in land and buildings, excluding real estate considered to be inventory of the entity.

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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Fair value portion of contractual arrangement with a lender under which borrowings can be made up to a specific amount at any point in time.

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Fair value portion of contractual obligation to pay money on demand or on fixed or determinable dates.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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