| Long Term Debt - Lonesome Oak Equipment Loan - Additional Information (Details) - Lonesome Oak - Extruded Fibers Inc. $ in Thousands | 9 Months Ended | 
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| Jun. 30, 2020  USD ($) | |
| Debt Instrument [Line Items] | |
| Debt periodic frequency | payable monthly in the amount of $100 for 36 months | 
| Debt periodic payment, principal | $ 100 | 
| Debt initial payment date | Mar. 31, 2020 | 
| Debt maturity date | Mar. 03, 2023 | 
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- Definition Date the debt agreement requires the first payment to be made, in CCYY-MM-DD format. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Description of the frequency of periodic payments (monthly, quarterly, annual). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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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 Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount of the required periodic payments applied to principal. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Details 
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- Details 
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