Quarterly report pursuant to Section 13 or 15(d)

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY

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CONDENSED 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, 2022 $ 49     $ 86 $ 1,306,271 $ (1,182,392) $ 124,014
Balance at beginning 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 (in shares)             0
Issuance of common stock related to 401(k) contribution         123   $ 123
Issuance of common stock related to 401(k) contribution (in shares)       7,000      
Stock-based compensation expense         1,570   1,570
Preferred stock dividends         (1,368)   (1,368)
Net loss and comprehensive loss           (9,813) (9,813)
Balance at end of period at Mar. 31, 2023 $ 49     $ 86 1,306,596 (1,192,205) 114,526
Balance at end of period (in shares) at Mar. 31, 2023 984,000 2,000 5,000 11,461,000      
Balance at beginning of period at Dec. 31, 2023 $ 49     $ 86 1,311,809 (1,223,223) 88,721
Balance at beginning of period (in shares) at Dec. 31, 2023 984,000 2,000 5,000 11,495,000      
Increase (Decrease) in Stockholders' Equity              
Exercise of stock options       $ 1 621   $ 622
Exercise of stock options (in shares)       135,000     134,959
Issuance of common stock related to 401(k) contribution         118   $ 118
Issuance of common stock related to 401(k) contribution (in shares)       7,000      
Stock-based compensation expense         2,856   2,856
Preferred stock dividends         (1,368)   (1,368)
Repurchase of common stock           (13) $ (13)
Repurchase of common stock (in shares)       (1,000)     (660)
Net loss and comprehensive loss           (8,595) $ (8,595)
Balance at end of period at Mar. 31, 2024 $ 49     $ 87 $ 1,314,036 $ (1,231,831) $ 82,341
Balance at end of period (in shares) at Mar. 31, 2024 984,000 2,000 5,000 11,636,000