Revenue (Details)	12 Months Ended
Sep. 30, 2019 USD ($)
Disaggregation of Revenue [Line Items]
Impairment loss on contract assets	$ 0
Remaining performance obligations	$ 117,600,000
Transferred over Time \| Revenue from Contract with Customer Benchmark
Disaggregation of Revenue [Line Items]
Percentage of concentration risk	56.00%

Amount of impairment loss for asset recognized from cost incurred to obtain or fulfill contract with customer.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Amount of transaction price allocated to performance obligation that has not been recognized as revenue.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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