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EQUITY, Equity Awards (Details) - USD ($)
 3 Months Ended 9 Months Ended
Jan. 31, 2017
Oct. 31, 2016
Jul. 31, 2016
Jan. 31, 2016
Oct. 31, 2015
Jul. 31, 2015
Jan. 31, 2017
Jan. 31, 2016
Equity                
Units converted to common stock (in shares) 194,000     27,000     252,000 180,000
Units converted to common stock $ 414,000     $ 125,000     $ 548,000 $ 981,000
2015 Incentive Plan [Member]                
Equity                
Equity awards issued (in shares) 0 121,000 378,000 0        
Shares issued   $ 502,000 $ 1,400,000          
2008 Incentive Award Plan [Member]                
Equity                
Equity awards issued (in shares)     59,000   0 220,000    
Shares issued     $ 352,000     $ 1,600,000    
Distribution Reinvestment and Share Purchase Plan [Member]                
Equity                
Shares issued (in shares) 0     0     0 821,000
Shares issued               $ 5,600,000
Average price of shares issued (in dollars per share)               $ 6.85
Distribution Reinvestment and Share Purchase Plan [Member] | Maximum [Member]                
Equity                
Shares registered (in shares)             10,000