Acquisition - Schedule of Intangible assets (Details) - USD ($) $ in Thousands		12 Months Ended
Jan. 13, 2020	Dec. 31, 2020
Intangible Assets, Excluding Goodwill [Roll Forward]
Intangible assets beginning		$ 0
Acquisition		6,620
Impairment of trade name—March 31, 2020		(810)
Amortization of intangible assets with definite lives		(1,276)
Intangible assets ending		$ 4,534
Jack's Flight Club
Business Acquisition [Line Items]
Fair Value	$ 6,600
Jack's Flight Club \| Customer relationships
Business Acquisition [Line Items]
Fair Value	$ 3,500
Estimated Life (Years)	5 years
Jack's Flight Club \| Trade name
Business Acquisition [Line Items]
Fair Value	$ 2,460
Jack's Flight Club \| Non-compete agreements
Business Acquisition [Line Items]
Fair Value	$ 660
Estimated Life (Years)	4 years

Intangible Assets, Excluding Goodwill, Acquired

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Intangible Assets, Excluding Goodwill

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value.

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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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