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, 2021 $ 49     $ 85 $ 1,307,030 $ (1,165,288) $ 141,876
Balance at beginning 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      
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      
Increase (Decrease) in Stockholders' Equity              
Exercise of stock options         235   $ 235
Exercise of stock options (in shares)       28,000     28,473
Stock-based compensation expense         9,099   $ 9,099
Issuance of common stock warrants         1,470   1,470
Issuance of common stock related to 401(k) contribution and ESPP         206   206
Issuance of common stock related to 401(k) contribution and ESPP (in shares)       13,000      
Preferred stock dividends         (5,472)   (5,472)
Net loss and comprehensive loss           (40,831) (40,831)
Balance at end of period at Dec. 31, 2023 $ 49     $ 86 $ 1,311,809 $ (1,223,223) $ 88,721
Balance at end of period (in shares) at Dec. 31, 2023 984,000 2,000 5,000 11,495,000