Estimated Fair Value of Financial Instruments - Additional Information (Details) - Convertible Senior Notes - USD ($) shares in Millions, $ in Millions	Feb. 14, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Convertible Senior Notes		$ 7.1
Shares convertible into common shares (in shares)	1.4

Number of shares issued for each share of convertible preferred stock that is converted.

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Name:	us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant