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Stockholders' Equity - Accumulated and Unpaid Dividends (Details) $ / shares in Units, $ in Thousands	Mar. 31, 2020 USD ($) $ / shares
Dividends Payable [Line Items]
Total Accumulated Dividends	$ 10,297
Series B Preferred Stock
Dividends Payable [Line Items]
Accumulated and Unpaid Dividends Per Share (in dollars per share) | $ / shares	$ 0.4843750
Total Accumulated Dividends	$ 1,529
Series C Preferred Stock
Dividends Payable [Line Items]
Accumulated and Unpaid Dividends Per Share (in dollars per share) | $ / shares	$ 0.4921875
Total Accumulated Dividends	$ 2,058
Series D Preferred Stock
Dividends Payable [Line Items]
Accumulated and Unpaid Dividends Per Share (in dollars per share) | $ / shares	$ 0.5000000
Total Accumulated Dividends	$ 3,062
Series E Preferred Stock
Dividends Payable [Line Items]
Accumulated and Unpaid Dividends Per Share (in dollars per share) | $ / shares	$ 0.4921875
Total Accumulated Dividends	$ 3,648

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