Related Party Transactions (Details) - USD ($) |
1 Months Ended | 9 Months Ended | 12 Months Ended | ||||
|---|---|---|---|---|---|---|---|
Jul. 11, 2016 |
Jan. 31, 2001 |
Sep. 30, 2017 |
Sep. 30, 2016 |
Dec. 31, 2001 |
Apr. 30, 2008 |
Dec. 31, 1991 |
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| Related Party Transaction [Line Items] | |||||||
| Shares repurchased value | $ 5,912,000 | $ 47,655,000 | |||||
| Investor | Common Stock Class A | |||||||
| Related Party Transaction [Line Items] | |||||||
| Shares repurchased | 1,000,000 | ||||||
| Shares repurchased value | $ 16,100,000 | ||||||
| Immediate Family Member of Management or Principal Owner | Property | |||||||
| Related Party Transaction [Line Items] | |||||||
| Capital lease obligations | $ 1,300,000 | $ 900,000 | |||||
| CEO | Air Transportation Equipment | |||||||
| Related Party Transaction [Line Items] | |||||||
| Termination period on lease | 12 months | ||||||
| Monthly lease payment | $ 132,000 | ||||||
| Security deposit | $ 1,500,000 | ||||||
| Security deposit termination period | 6 months | ||||||
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- Definition Capital Lease, Monthly Lease Payment No definition available.
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- Definition Capital Lease, Termination Period No definition available.
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- Definition Security Deposit, Termination Period No definition available.
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- Definition Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition The amount of an asset, typically cash, provided to a counterparty to provide certain assurance of performance by the entity pursuant to the terms of a written or oral agreement, such as a lease. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Number of shares that have been repurchased and retired during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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