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LINE OF CREDIT (Details)
$ in Thousands
 12 Months Ended
Apr. 30, 2015
USD ($)
Property
LineofCredit
Apr. 30, 2014
USD ($)
Credit Facility [Abstract]    
Amount available $ 90,000  
First International Bank & Trust [Member]    
Credit Facility [Abstract]    
Amount available 90,000  
Amount outstanding $ 60,500 $ 22,500
Interest rate (in hundredths) 4.75%  
Maturity date Sep. 01, 2017  
Weighted average interest rate (in hundredths) 4.75%  
Line of Credit [Member]    
Line of Credit Facility [Line Items]    
Line of credit, minimum outstanding principal balance $ 17,500  
Debt instrument, description of variable rate basis Journal Prime Rate  
Debt instrument, basis spread on variable rate (in hundredths) 1.25%  
Debt instrument, covenant description The line of credit may be prepaid at par at any time. The facility includes covenants and restrictions requiring the Company to achieve on a calendar quarter basis a debt service coverage ratio on borrowing base collateral of 1.25x in the aggregate and 1.00x on individual assets in the collateral pool  
Number of properties securing line of credit | Property 15  
Line of credit facility, collateral cost $ 136,100  
Line of Credit [Member] | First International Bank & Trust [Member]    
Line of Credit Facility [Line Items]    
Number of securing line of credit | LineofCredit 1  
Minimum deposit $ 6,000  
Non-interest bearing account $ 1,500  
Line of Credit [Member] | Interest Rate Cap [Member]    
Line of Credit Facility [Line Items]    
Debt instrument, interest rate (in hundredths) 8.65%  
Line of Credit [Member] | Interest Rate Floor [Member]    
Line of Credit Facility [Line Items]    
Debt instrument, interest rate (in hundredths) 4.75%