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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) | Apr. 30, 2016 | Apr. 30, 2015
--- | --- | ---
Other assets |  |
Intangible assets, accumulated amortization | $ 6,230,000 | $ 6,112,000
Property and equipment, accumulated depreciation | 1,058,000 | 1,374,000
Deferred charges and leasing costs, accumulated amortization | $ 8,716,000 | $ 7,524,000
EQUITY |  |
Common Shares of Beneficial Interest, no par value (in dollars per share) | $ 0 | $ 0
Common Shares of Beneficial Interest, shares issued (in shares) | 121,091,249 | 124,455,624
Common Shares of Beneficial Interest, shares outstanding (in shares) | 121,091,249 | 124,455,624
Noncontrolling interests - Operating Partnership (in shares) | 16,285,239 | 13,999,725
Receivable Arising from Straight-Lining of Rents [Member] |  |
Other assets |  |
Accounts receivable, allowance | $ 333,000 | $ 222,000
Accounts Receivable [Member] |  |
Other assets |  |
Accounts receivable, allowance | $ 97,000 | $ 439,000
Preferred Class A [Member] |  |
EQUITY |  |
Preferred Shares of Beneficial Interest, no par value (in dollars per share) | $ 0 | $ 0
Preferred Shares of Beneficial Interest, shares issued (in shares) | 1,150,000 | 1,150,000
Preferred Shares of Beneficial Interest, shares outstanding (in shares) | 1,150,000 | 1,150,000
Preferred Shares of Beneficial Interest, aggregate liquidation preference | $ 28,750,000 | $ 28,750,000
Preferred Class B [Member] |  |
EQUITY |  |
Preferred Shares of Beneficial Interest, no par value (in dollars per share) | $ 0 | $ 0
Preferred Shares of Beneficial Interest, shares issued (in shares) | 4,600,000 | 4,600,000
Preferred Shares of Beneficial Interest, shares outstanding (in shares) | 4,600,000 | 4,600,000
Preferred Shares of Beneficial Interest, aggregate liquidation preference | $ 115,000,000 | $ 115,000,000

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