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Revenues from Contracts with Customers - Additional Information (Details) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) Customer	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($) Customer
Revenue From Contract With Customer [Line Items]
Deferred revenue	$ 11.0		$ 11.0		$ 12.3
Revenue remaining performance obligation	6.7		6.7		$ 7.4
Revenue recognized	$ 1.5	$ 0.4	$ 6.3	$ 2.1
Revenue practical expedient, incremental cost of obtaining contract [true/false]			true
Customer Concentration Risk | Trade Accounts Receivable
Revenue From Contract With Customer [Line Items]
Number of customer | Customer			1		1
Concentration risk, percentage			10.00%		10.00%

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Number of customers.

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

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Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

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Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

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Indicates (true false) whether practical expedient was elected to recognize incremental cost of obtaining contract as expense when incurred if amortization period would have been one year or less.

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Amount of transaction price allocated to performance obligation that has not been recognized as revenue.

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