Quarterly report pursuant to Section 13 or 15(d)

Unaudited Condensed Consolidated Statement of Changes in Stockholders' Equity (Deficit)

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Unaudited Condensed Consolidated Statement of Changes in Stockholders' Equity (Deficit) - USD ($)
$ in Thousands
Preferred Stock
Common Stock
Additional Paid-In Capital
Accumulated Deficit
Non-Controlling Interests
Total
Balance at Dec. 31, 2022 $ 3 $ 7 $ 675,944 $ (634,233) $ 8,304 $ 50,025
Balance (in shares) at Dec. 31, 2022 3,427,138 7,366,283        
Stock-based compensation expense     4,731     4,731
Issuance of common stock related to equity plans (in shares)   178,341        
Issuance of common stock for public offering, net   $ 1 13,193     13,194
Issuance of stock for public offerings, net (in shares)   1,109,526        
Issuance of common stock for at-the-market offering, net     447     447
Issuance of common stock for at-the-market offering, net (in shares)   40,326        
Preferred A dividends declared and paid     (2,008)     (2,008)
Partner company's at-the-market offering, net     7,518     7,518
Partner company's dividends declared and paid     (186)     (186)
Issuance of partner company's common shares for research and development expenses     1,230     1,230
Non-controlling interest in partner companies     (7,314)   7,314  
Net loss attributable to non-controlling interest         (33,608) (33,608)
Net loss attributable to common stockholders       (21,537)   (21,537)
Balance at Mar. 31, 2023 $ 3 $ 8 693,555 (655,770) (17,990) 19,806
Balance (in shares) at Mar. 31, 2023 3,427,138 8,694,476        
Balance at Dec. 31, 2023 $ 3 $ 15 717,396 (694,870) (20,957) 1,587
Balance (in shares) at Dec. 31, 2023 3,427,138 15,093,053        
Stock-based compensation expense     4,857     4,857
Issuance of common stock related to equity plans (in shares)   461,468        
Issuance of common stock for public offering, net   $ 4 10,115     10,119
Issuance of stock for public offerings, net (in shares)   3,303,305        
Issuance of common stock for at-the-market offering, net     894     894
Issuance of common stock for at-the-market offering, net (in shares)   462,200        
Common shares issued for dividend on partner company's convertible preferred shares     68     68
Common shares issued for dividend on partner company's convertible preferred shares (in shares)   37,817        
Preferred A dividends declared and paid     (2,008)     (2,008)
Exercise of warrants for cash     30     30
Exercise of warrants for cash (in shares)   17,500        
Partner company's offering, net     12,636     12,636
Partner company's at-the-market offering, net     1,484     1,484
Partner companies' proceeds from options and warrants, net     5,461     5,461
Issuance of common stock under partner company's ESPP     133     133
Partner company's dividends declared and paid     (176)     (176)
Non-controlling interest in partner companies     (17,600)   17,600  
Net loss attributable to non-controlling interest         (23,605) (23,605)
Net loss attributable to common stockholders       (15,417)   (15,417)
Balance at Mar. 31, 2024 $ 3 $ 19 $ 733,290 $ (710,287) $ (26,962) $ (3,937)
Balance (in shares) at Mar. 31, 2024 3,427,138 19,375,343