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Organization, Basis of Presentation, and Summary of Significant Accounting Policies Concentration of Credit and Business Risk (Details) $ in Thousands | 5 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jun. 30, 2014 USD ($) | Jun. 30, 2016 USD ($) dealer | Jun. 30, 2015 USD ($) | Jun. 30, 2014 | Apr. 02, 2015 USD ($)
Concentration Risk [Line Items] |  |  |  |  |
Capitalized offering costs | $ (1,550) |  | $ (1,498) |  |
Total debt |  | $ 71,086 | $ 77,342 |  |
Concentration risk, credit risk, line of credit period |  | 14 days |  |  |
Number of independent dealers | dealer |  | 205 |  |  |
Customer Concentration Risk [Member] |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk percentage |  | 5.30% | 4.70% | 4.70% |
Unit Volume [Member] |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk percentage |  | 31.90% | 33.70% | 34.10% |
Secured Debt [Member] |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Total debt |  |  |  |  | $ 80,000
Additional Paid-in Capital [Member] |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Capitalized offering costs | $ (1,550) |  | $ (1,498) |  |

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