v3.21.2

Cash, Cash Equivalents, and Restricted Cash - Narrative (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
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Cash, Cash Equivalents, and Restricted Cash |  |
Deposits in excess of FDIC limits | $ 106,120 | $ 88,556
Amount of cash in overseas accounts | $ 2,274 | $ 1,158

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of time deposit liabilities, including certificates of deposit, in denominations that meet or exceed the Federal Deposit Insurance Corporation (FDIC) insurance limit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 405 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=116652737&loc=d3e64164-112818 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Represents the amount of cash held in overseas accounts. + References No definition available. + Details
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Namespace Prefix: | xspa_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant