Quarterly report pursuant to Section 13 or 15(d)

Assets Held for Sale, Discontinued Operations and Disposals - Cash Flow Information (Details)

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Assets Held for Sale, Discontinued Operations and Disposals - Cash Flow Information (Details) - USD ($)
$ in Thousands
3 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Reversal of allowance for doubtful accounts, net $ 5 $ (59)
Tempress and SoLayTec | Discontinued Operations, Held-for-sale    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Loss from discontinued operations, net of tax   (665)
Depreciation and amortization   135
Reversal of allowance for doubtful accounts, net   (66)
Purchases of property, plant and equipment   $ 1