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Fair Value Measurements - Assets and Liabilities Measured and Recorded at Fair Value on a Recurring Basis (Details) - USD ($)
Mar. 31, 2017
Jun. 30, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Preferred stock $ 26,541,000 $ 25,591,000
Estimate of Fair Value Measurement    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Preferred stock 26,541,000 25,591,000
Estimate of Fair Value Measurement | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Preferred stock 23,606,000 21,976,000
Estimate of Fair Value Measurement | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Preferred stock 2,935,000 3,615,000
Estimate of Fair Value Measurement | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Preferred stock 0 0
Estimate of Fair Value Measurement | Coffee-related Derivative Instruments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Coffee-related derivative assets 522,000 6,346,000
Coffee-related derivative liabilities 326,000  
Price Risk Derivative Instruments Not Designated as Hedging Instruments Asset, at Fair Value 1,000 240,000
Coffee-related derivative liabilities 536,000  
Estimate of Fair Value Measurement | Coffee-related Derivative Instruments | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Coffee-related derivative assets 0 0
Coffee-related derivative liabilities 0  
Price Risk Derivative Instruments Not Designated as Hedging Instruments Asset, at Fair Value 0 0
Coffee-related derivative liabilities 0  
Estimate of Fair Value Measurement | Coffee-related Derivative Instruments | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Coffee-related derivative assets 522,000 6,346,000
Coffee-related derivative liabilities 326,000  
Price Risk Derivative Instruments Not Designated as Hedging Instruments Asset, at Fair Value 1,000 240,000
Coffee-related derivative liabilities 536,000  
Estimate of Fair Value Measurement | Coffee-related Derivative Instruments | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Coffee-related derivative assets 0 0
Coffee-related derivative liabilities 0  
Price Risk Derivative Instruments Not Designated as Hedging Instruments Asset, at Fair Value 0 $ 0
Coffee-related derivative liabilities $ 0