Convertible Debt at Fair Value (Narrative) (Details) - USD ($)				11 Months Ended	12 Months Ended
	Mar. 01, 2017	Feb. 28, 2017	Mar. 16, 2016	Dec. 01, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Nov. 19, 2020
Debt Instrument [Line Items]
Gain (loss) on derivatives and convertible debt				$ 6,330,000		$ (6,331,000)	$ (1,071,000)
Series D Preferred Stock [Member]
Debt Instrument [Line Items]
Preferred stock, annual dividend rate			6.25%
Series E Preferred Stock [Member]
Debt Instrument [Line Items]
Preferred stock, annual dividend rate	6.25%	6.25%				6.25%
2016 Notes [Member]
Debt Instrument [Line Items]
Interest rate			6.25%
Principal amount			$ 1,012,000
Maximum ownership percentage of voting stock upon debt conversion			49.00%
Gain (loss) on derivatives and convertible debt				$ 5,863,000		$ (5,795,000)	$ (80,000)
2016 Notes [Member] | Series D Preferred Stock [Member]
Debt Instrument [Line Items]
Number of shares of common stock debt can convert into			97,269
2016 Notes [Member] | Series E Preferred Stock [Member]
Debt Instrument [Line Items]
Number of shares of common stock debt can convert into	97,269
Convertible Promissory Notes [Member]
Debt Instrument [Line Items]
Principal amount								$ 7,220,000
Loan Agreements [Member]
Debt Instrument [Line Items]
Principal amount								2,780,000
2020 Notes [Member]
Debt Instrument [Line Items]
Interest rate					10.00%
Principal amount								$ 10,000,000
Debt default interest rate					20.00%
Make Whole Fee interest rate					25.00%