Summary of Significant Accounting Policies - Restricted Cash (Details)	Dec. 31, 2020
Restricted Cash
Current portion of restricted cash, balance sheet location	us-gaap:OtherAssetsCurrent
Non-current portion of restricted cash, balance sheet location	us-gaap:OtherAssetsNoncurrent

Indicates line item in statement of financial position that includes cash and cash equivalents restricted to withdrawal or usage, classified as noncurrent.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=98513485&loc=SL98516268-108586

Name:	us-gaap_RestrictedCashAndCashEquivalentsNoncurrentAssetStatementOfFinancialPositionExtensibleList
Namespace Prefix:	us-gaap_
Data Type:	srt-types:extensibleListItemType
Balance Type:	na
Period Type:	instant