Discontinued Operations - Unconsolidated Subsidiaries - Balance Sheets (Details) - ULVAC Cryogenics, Inc. - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017
Equity Method Investment, Summarized Financial Information [Abstract]
Current assets	$ 69,302	$ 74,645
Non-current assets	21,338	16,829
Current liabilities	26,006	29,622
Non-current liabilities	$ 8,397	$ 7,860

The amount of noncurrent liabilities reported by an equity method investment of the entity.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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