Significant Accounting Policies - Additional Information (Details)		12 Months Ended
		Dec. 31, 2022 USD ($) t	Dec. 31, 2021 USD ($)		Dec. 31, 2020 USD ($)		Dec. 31, 2019 USD ($)
Property, Plant and Equipment [Line Items]
Vessel useful lives		3 years
Charter rates average, term		15 years
Asset impairment charges		$ 0	$ 0		$ 0
Amortization period for vessels over fifteen years old		30 months
Age of vessels		15 years
Amortization period for vessels less than fifteen years old		60 months
Depreciation expense		$ 200,000	300,000		300,000
Impairment of operating lease right-of-use assets		2,212,000	0		352,000
Net (gain) loss on lower of cost and NRV adjustments		(8,100,000)	(6,300,000)		(600,000)
Collateral on derivatives		909,000	15,081,000
Adjustment to beginning retained earnings		$ 819,181,000	671,266,000		470,418,000		$ 481,503,000
Minimum
Property, Plant and Equipment [Line Items]
Charter rates, terms		1 year
Maximum
Property, Plant and Equipment [Line Items]
Charter rates, terms		3 years
Convertible Debt Securities | Convertible Debt
Property, Plant and Equipment [Line Items]
Deferred financing fee		$ (620,000)	(13,165,000)
Accumulated Deficit
Property, Plant and Equipment [Line Items]
Adjustment to beginning retained earnings		(163,556,000)	(313,495,000)		(472,138,000)		(437,074,000)
Additional paid-in Capital
Property, Plant and Equipment [Line Items]
Adjustment to beginning retained earnings		$ 966,058,000	982,746,000	[1]	$ 943,572,000	[1]	$ 918,475,000	[1]
Accounting Standards Update 2020-06 | Convertible Debt Securities | Convertible Debt
Property, Plant and Equipment [Line Items]
Deferred financing fee			12,000,000
Cumulative Effect, Period of Adoption, Adjustment
Property, Plant and Equipment [Line Items]
Adjustment to beginning retained earnings			(12,051,000)
Cumulative Effect, Period of Adoption, Adjustment | Accumulated Deficit
Property, Plant and Equipment [Line Items]
Adjustment to beginning retained earnings			8,675,000
Cumulative Effect, Period of Adoption, Adjustment | Additional paid-in Capital
Property, Plant and Equipment [Line Items]
Adjustment to beginning retained earnings	[1]		(20,726,000)
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2020-06 | Accumulated Deficit
Property, Plant and Equipment [Line Items]
Adjustment to beginning retained earnings			8,700,000
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2020-06 | Additional paid-in Capital
Property, Plant and Equipment [Line Items]
Adjustment to beginning retained earnings			$ 20,700,000
Vessels
Property, Plant and Equipment [Line Items]
Vessel useful lives		25 years
Scrap value of vessels | t		300

[1] * Adjusted retroactively to give effect for the 1-for-7 Reverse Stock Split that became effective as of September 15, 2020, see Note 1, General Information.