Derivative Instruments - Summary of Interest Rate Swaps (Details) - Interest Rate Swap - USD ($)	Sep. 30, 2021	Aug. 31, 2021	Dec. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Notional Amount outstanding	$ 0		$ 166,429,594
Amount of cancelled interest rate swap	143,000,000	$ 150,800,000
Amount of loss incurred on canceled interest rate swap	$ 200,000	$ 200,000
March 31, 2020 | New Ultraco Debt Facility
Derivative Instruments, Gain (Loss) [Line Items]
Fixed interest rate	0.64%
Notional Amount outstanding	$ 0		72,452,297
April 15, 2020 | New Ultraco Debt Facility
Derivative Instruments, Gain (Loss) [Line Items]
Fixed interest rate	0.58%
Notional Amount outstanding	$ 0		36,226,149
June 25, 2020 | New Ultraco Debt Facility
Derivative Instruments, Gain (Loss) [Line Items]
Fixed interest rate	0.50%
Notional Amount outstanding	$ 0		$ 57,751,148