Significant Accounting Policies - Operating Lease Assets and Liabilities (Details) - USD ($)	3 Months Ended		12 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 25, 2019	Jan. 01, 2019	Jan. 01, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets			$ 7,540,871	$ 20,410,037			$ 20,410,037
Current portion of operating lease liabilities			7,615,371	13,255,978			13,255,978
Noncurrent portion of operating lease liabilities			$ 686,422	8,301,793			8,301,793
Discount rate upon adoption			5.48%			2.806%
Increase to right-of-use asset			$ 4,500,000
Increase to lease liability			4,500,000
Impairment of operating lease right-of-use assets	$ 400,000	$ 400,000	$ 352,368	$ 0	$ 0
Weighted average remaining lease term			10 months 12 days
Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Discount rate upon adoption			2.81%
Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Discount rate upon adoption			6.08%
Weighted Average
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Discount rate upon adoption			5.22%
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets								$ 30,500,000
Fair value of derivatives - noncurrent								$ 1,800,000
Chartered In Contracts
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets			$ 6,207,253				18,442,965
Current portion of operating lease liabilities			6,974,943				12,622,524
Noncurrent portion of operating lease liabilities			$ 0				6,974,943
Discount rate upon adoption			5.37%
Office Building
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets			$ 1,333,618				1,967,072
Current portion of operating lease liabilities			640,428				633,454
Noncurrent portion of operating lease liabilities			$ 686,422				$ 1,326,850
Discount rate upon adoption			5.80%