Number of shares issued for each share of convertible preferred stock that is converted.

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The percentage rate used to calculate dividend payments on preferred stock.

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The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Stock Transactions And Stock-Based Compensation (Key Terms of Shares) (Details) - $ / shares		1 Months Ended	12 Months Ended
	Mar. 01, 2019	May 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Series A Preferred Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock, dividend rate, percentage	4.75%		4.75%	4.75%
Preferred stock, liquidation preference per share	$ 1,000		$ 1,000
Series A Preferred Stock \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Convertible preferred stock, shares issued upon conversion			6.6611
Series A Preferred Stock \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Convertible preferred stock, shares issued upon conversion			8.1598
Series B Preferred Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock, dividend rate, percentage		5.00%	5.00%	5.00%
Preferred stock, liquidation preference per share		$ 1,000	$ 1,000
Series B Preferred Stock \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Convertible preferred stock, shares issued upon conversion			5.0103
Series B Preferred Stock \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Convertible preferred stock, shares issued upon conversion			6.1376