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Revenue from Contracts with Customers - Summary of Changes in Deferred Revenue (Details)	3 Months Ended
	Mar. 31, 2018 USD ($)
Revenue Recognition And Deferred Revenue [Abstract]
Balance at December 31, 2017	$ 24,442
Revenue recognized in the current period from the amounts in the beginning balance	(6,907)
New deferrals, net of amounts recognized in the current period	5,505
Balance at March 31, 2018	$ 23,040

The carrying amount of consideration received or receivable as of the balance sheet date on potential earnings that were not recognized as revenue in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer, including sales, license fees, and royalties, but excluding interest income.

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