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Commitment and Contingencies Commitments and Contingencies (Details)
 1 Months Ended 12 Months Ended
May 30, 2017
USD ($)
May 02, 2017
USD ($)
Aug. 26, 2016
USD ($)
Feb. 06, 2015
USD ($)
Oct. 06, 2014
USD ($)
Sep. 30, 2014
USD ($)
Jun. 30, 2017
USD ($)
Option
Jun. 30, 2017
USD ($)
unit
Option
Jun. 30, 2017
USD ($)
Option
Jun. 30, 2017
USD ($)
Option
Members
Jun. 30, 2016
USD ($)
Jun. 30, 2016
dealer
Jun. 30, 2016
Members
Jun. 30, 2015
USD ($)
Jun. 30, 2014
USD ($)
Dec. 15, 2016
USD ($)
Loss Contingencies [Line Items]                                
Loss Contingency, Damages Sought, Value     $ 5,000,000               $ 3,268          
Amended Litigation Settlement, Amount                               $ 1,938,000
Repurchase Units, Number               3   0     3      
Repurchase Dealers, Number                       2 2      
Unit repurchase loss                     30,000          
Monthly lease payments                 $ 156,000              
Lease, Number of Options | Option             3 3 3 3            
Sale leaseback transaction, lease terms             10 years                  
Operating leases, rental expense                 $ 2,384,000   2,394,000     $ 2,256,000    
2016             $ 2,263,000 $ 2,263,000 2,263,000 $ 2,263,000            
2017             2,297,000 2,297,000 2,297,000 2,297,000            
2018             2,302,000 2,302,000 2,302,000 2,302,000            
2019             2,303,000 2,303,000 2,303,000 2,303,000            
2020             2,315,000 2,315,000 2,315,000 2,315,000            
Thereafter             12,577,000 12,577,000 12,577,000 12,577,000            
Total             24,057,000 24,057,000 24,057,000 24,057,000            
Litigation settlement payable           $ 20,000,000                    
Litigation settlement, expense                             $ 20,000,000  
Litigation settlement, payment       $ 2,250,000 $ 20,000,000                      
Litigation settlement, amount $ (2,175,000) $ 2,500,000                 $ 3,268,000          
Loss Contingency Accrual             $ 0 $ 0 $ 0 $ 0