Merger (Details) $ / shares in Units, $ in Thousands	Jul. 28, 2022 USD ($) d $ / shares	Jun. 30, 2023 USD ($) $ / shares shares	May 31, 2023 $ / shares	Apr. 28, 2023 $ / shares	Mar. 31, 2023 $ / shares	Feb. 28, 2023 $ / shares	Jan. 31, 2023 $ / shares	Oct. 26, 2022 $ / shares	Apr. 30, 2021 USD ($) shares	May 12, 2020 USD ($) shares
PSP 1
Business Acquisition [Line Items]
Warrants exercise price (in dollars per share)		$ 12.137
Number of warrants (in shares) | shares		604,170.87
PSP 2
Business Acquisition [Line Items]
Warrants exercise price (in dollars per share)		$ 21.051
Number of warrants (in shares) | shares		159,798.98
PSP 3
Business Acquisition [Line Items]
Warrants exercise price (in dollars per share)		$ 31.421
Number of warrants (in shares) | shares		93,429.46
Convertible notes due 2025 | Convertible Notes
Business Acquisition [Line Items]
Shares conversion rate per portion of principal amount (in shares) | shares		91.4187								78.4314
Principal amount portion for trading price threshold | $		$ 1								$ 1
1.00% convertible notes due 2026 | Convertible Notes
Business Acquisition [Line Items]
Shares conversion rate per portion of principal amount (in shares) | shares		23.7536							20.3791
Principal amount portion for trading price threshold | $		$ 1							$ 1
JetBlue Merger Agreement
Business Acquisition [Line Items]
Merger consideration, price per share (in dollars per share)	$ 33.50
Approval prepayment amount price per share (in dollars per share)	2.50							$ 2.50
Additional approval prepayment amount price per share (in dollars per share)	0.10
Approval prepayment maximum share price threshold (in dollars per share)	$ 1.15
Additional prepayment amount, maximum number of days after end of month for payment | d	5
Additional prepayment amount, maximum number of days after stockholder approval for payment	5 days
Additional approval prepayment per share amount paid (in dollars per share)		$ 0.10	$ 0.10	$ 0.10	$ 0.10	$ 0.10	$ 0.10
Business acquisition, breakup fee | $	$ 94,200
Payment to be received upon termination of merger agreement, antitrust regulatory clearance not approved | $	70,000
Payment to be received by stockholders' upon termination of merger agreement, antitrust regulatory clearance not approved | $	$ 400,000