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CONDENSED STATEMENTS OF STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($)
$ in Thousands
Total
Convertible Preferred Stock [Member]
Series F Preferred Stock [Member]
Preferred Stock [Member]
Preferred Stock [Member]
Series F Preferred Stock [Member]
Common Stock [Member]
Additional Paid-in Capital [Member]
Additional Paid-in Capital [Member]
Series F Preferred Stock [Member]
Accumulated Deficit [Member]
Balance at Dec. 31, 2021 $ 10,836         $ 1 $ 457,745   $ (446,910)
Balance (in shares) at Dec. 31, 2021   1,952       1,034,002      
Stock-based compensation 180           180    
Issue and sale of stock, net 7,742           7,742    
Issue and sale of share           445,841      
Net loss (4,116)               (4,116)
Balance at Mar. 31, 2022 14,642         $ 1 465,667   (451,026)
Balance (in shares) at Mar. 31, 2022   1,952       1,479,842      
Balance at Dec. 31, 2021 10,836         $ 1 457,745   (446,910)
Balance (in shares) at Dec. 31, 2021   1,952       1,034,002      
Net loss (9,398)                
Balance at Jun. 30, 2022 9,679         $ 1 465,986   (456,308)
Balance (in shares) at Jun. 30, 2022   1,952       1,497,912      
Balance at Dec. 31, 2021 10,836         $ 1 457,745   (446,910)
Balance (in shares) at Dec. 31, 2021   1,952       1,034,002      
Balance at Dec. 31, 2022 6,445         $ 2 473,628   (467,185)
Balance (in shares) at Dec. 31, 2022   1,952       2,240,092      
Balance at Mar. 31, 2022 14,642         $ 1 465,667   (451,026)
Balance (in shares) at Mar. 31, 2022   1,952       1,479,842      
Stock-based compensation 167           167    
Issue and sale of stock, net 152           152    
Issue and sale of share           18,070      
Net loss (5,282)               (5,282)
Balance at Jun. 30, 2022 9,679         $ 1 465,986   (456,308)
Balance (in shares) at Jun. 30, 2022   1,952       1,497,912      
Balance at Dec. 31, 2022 6,445         $ 2 473,628   (467,185)
Balance (in shares) at Dec. 31, 2022   1,952       2,240,092      
Stock-based compensation 140           140    
Issue and sale of stock, net 895   $ 1       895 $ 1  
Issue and sale of share         1 168,164      
Net loss (4,805)               (4,805)
Balance at Mar. 31, 2023 2,676         $ 2 474,664   (471,990)
Balance (in shares) at Mar. 31, 2023   1,952   1   2,408,256      
Balance at Dec. 31, 2022 6,445         $ 2 473,628   (467,185)
Balance (in shares) at Dec. 31, 2022   1,952       2,240,092      
Net loss (6,287)                
Balance at Jun. 30, 2023 2,662         $ 3 476,131   (473,472)
Balance (in shares) at Jun. 30, 2023   1,952       2,879,620      
Balance at Mar. 31, 2023 2,676         $ 2 474,664   (471,990)
Balance (in shares) at Mar. 31, 2023   1,952   1   2,408,256      
Redemption of Series F preferred stock (in shares)       (1)          
Fractional adjustment           (1,310)      
Stock-based compensation 140           140    
Issue and sale of stock, net 1,328         $ 1 1,327    
Issue and sale of share           472,674      
Net loss (1,482)               (1,482)
Balance at Jun. 30, 2023 $ 2,662         $ 3 $ 476,131   $ (473,472)
Balance (in shares) at Jun. 30, 2023   1,952       2,879,620