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Leases - Supplemental Balance Sheet Information Schedule (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Sep. 30, 2019
--- | --- | ---
ASSETS |  |
Property, plant and equipment, net | $ 89 |
Operating lease right-of-use assets, net | 17,021 | $ 0
Total lease assets | 17,110 |
Current liabilities: |  |
Current maturities of long-term debt | 58 |
Short-term operating lease liabilities | 991 | 0
Liabilities, Noncurrent [Abstract] |  |
Long-term debt, net of current maturities | 22 |
Long-term operating lease liabilities, net of short-term | 16,188 | $ 0
Total lease liabilities | $ 17,259 |
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Finance Lease, Liability, Current, Statement of Financial Position [Extensible List] | us-gaap:LongTermDebtCurrent |
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] | us-gaap:LongTermDebtNoncurrent |

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- Definition Present value of lessee's discounted obligation for lease payments from finance lease, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977 + Details
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