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Revenue - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2019
Disaggregation of Revenue [Line Items] |  |  |
Period of amortization | 3 years |  |
Amortization | $ 0.3 | $ 0.2 |
Minimum |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Remaining performance obligation, period | 2 years |  |
Maximum |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Remaining performance obligation, period | 7 years |  |
Equipment |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Contract assets | $ 2.0 |  | $ 2.1

X
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- Definition Amortization period of cost capitalized in obtaining or fulfilling contract with customer, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 40 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=68051541&loc=SL49131251-203054 + Details
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- Definition Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=68051541&loc=SL49131252-203054 + Details
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