Assets Held for Sale, Discontinued Operations and Disposals - Operating Results of Discontinued Operations (Details)	3 Months Ended
	Dec. 31, 2019 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income tax provision	$ 19,000
Net loss from discontinued operations, net of tax	(665,000)
Tempress and SoLayTec | Discontinued Operations, Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues, net of returns and allowances	5,287,000
Cost of sales	4,139,000
Gross profit	1,148,000
Selling, general and administrative	1,338,000
Research, development and engineering	449,000
Operating loss	(639,000)
Interest expense and other, net	(7,000)
Loss from discontinued operations before income taxes	(646,000)
Income tax provision	19,000
Net loss from discontinued operations, net of tax	$ (665,000)