Stockholders' Equity - Treasury Stock (Details) - shares	3 Months Ended	12 Months Ended
Mar. 31, 2020	Dec. 31, 2020	Nov. 08, 2017
Stockholders' Equity
Treasury stock, shares authorized			1,666,667
Share Repurchased (in shares)		929,049
Shares returned in connection with the Appraisal Action following repayment of Margin Loan (in shares)	1,523,578

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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