Annual report pursuant to Section 13 and 15(d)

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY

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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Preferred Stock
8.625% Series A Cumulative, Perpetual Preferred Stock
Preferred Stock
8.375% Series B Cumulative, Perpetual Preferred Stock
Preferred Stock
Convertible preferred stock
Common Stock
Additional Paid-In Capital
Accumulated Deficit
Total
Balance at beginning of period at Dec. 31, 2020 $ 49     $ 84 $ 1,267,377 $ (1,181,086) $ 86,424
Balance at beginning of period (in shares) at Dec. 31, 2020 984,000   5,000 11,229,000      
Increase (Decrease) in Stockholders' Equity              
Issuance of preferred stock         37,140   37,140
Issuance of preferred stock (in shares)   2,000          
Exercise of stock options       $ 1 1,052   1,053
Exercise of stock options (in shares)       77,000      
Stock-based compensation expense         6,195   6,195
Exercise of common stock warrants (in shares)       5,000      
Issuance of common stock related to 401(k) contribution and ESPP         133   133
Issuance of common stock related to 401(k) contribution and ESPP (in shares)       4,000      
Preferred stock dividends         (4,867)   (4,867)
Net loss and comprehensive loss           15,798 15,798
Balance at end of period at Dec. 31, 2021 $ 49     $ 85 1,307,030 (1,165,288) 141,876
Balance at end of period (in shares) at Dec. 31, 2021 984,000 2,000 5,000 11,315,000      
Increase (Decrease) in Stockholders' Equity              
Exercise of stock options       $ 1 929   $ 930
Exercise of stock options (in shares)       129,000     128,811
Stock-based compensation expense         3,608   $ 3,608
Issuance of common stock related to 401(k) contribution and ESPP         176   176
Issuance of common stock related to 401(k) contribution and ESPP (in shares)       10,000      
Preferred stock dividends         (5,472)   (5,472)
Net loss and comprehensive loss           (17,104) (17,104)
Balance at end of period at Dec. 31, 2022 $ 49     $ 86 $ 1,306,271 $ (1,182,392) $ 124,014
Balance at end of period (in shares) at Dec. 31, 2022 984,000 2,000 5,000 11,454,000