Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Statements of Stockholders' Equity (Unaudited)

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Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($)
$ in Thousands
Public Offering [Member]
Common Stock Outstanding [Member]
Public Offering [Member]
Additional Paid-in Capital [Member]
Public Offering [Member]
Retained Earnings [Member]
Public Offering [Member]
Treasury Stock, Common [Member]
Public Offering [Member]
ATM [Member]
Common Stock Outstanding [Member]
ATM [Member]
Additional Paid-in Capital [Member]
ATM [Member]
Retained Earnings [Member]
ATM [Member]
Treasury Stock, Common [Member]
ATM [Member]
Common Stock Outstanding [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Treasury Stock, Common [Member]
Total
Balance (in shares) at Dec. 31, 2022                     79,481,751     0  
Balance at Dec. 31, 2022                     $ 79 $ 220,114 $ (199,277) $ 0 $ 20,916
Stock-based compensation                     $ 0 1,285 0 $ 0 1,285
Common stock issued to employees and directors, includes RSUs vesting and withholdings to satisfy tax withholdings on RSUs vesting (in shares)                     880,763     510,632  
Common stock issued to employees and directors, includes RSUs vesting and withholdings to satisfy tax withholdings on RSUs vesting                     $ 1 0 0 $ (577) (576)
Common stock issued for employee stock purchase plan sales (in shares)                     192,707        
Common stock issued for employee stock purchase plan sales                     $ 0 122 0 0 122
Common stock and warrants issued, net of transaction costs (in shares)           2,409,707         57,375        
Common stock and warrants issued, net of transaction costs           $ 3 $ 2,781 $ 0 $ 0 $ 2,784 $ 0 64 0 0 64
Net loss                     0 0 (9,365) 0 (9,365)
Stock-based compensation                     $ 0 1,285 0 0 1,285
RSUs issued for consulting services (in shares)                     15,781        
RSUs issued for consulting services                     $ 0 12 0 0 12
Common stock issued for class action settlement (in shares)                     469,366        
Common stock issued for class action settlement                     $ 1 500 0 $ 0 501
Balance (in shares) at Jun. 30, 2023                     83,507,450     510,632  
Balance at Jun. 30, 2023                     $ 84 224,878 (208,642) $ (577) 15,743
Balance (in shares) at Mar. 31, 2023                     82,670,169     510,632  
Balance at Mar. 31, 2023                     $ 83 223,453 (203,883) $ (577) 19,076
Stock-based compensation                     $ 0 599 0 0 599
Common stock issued to employees and directors, includes RSUs vesting and withholdings to satisfy tax withholdings on RSUs vesting (in shares)                     58,652        
Common stock issued to employees and directors, includes RSUs vesting and withholdings to satisfy tax withholdings on RSUs vesting                     $ 0 0 0 $ 0 0
Common stock and warrants issued, net of transaction costs (in shares)           746,754         31,875     0  
Common stock and warrants issued, net of transaction costs           $ 1 794 0 0 $ 795 $ 0 32 0 $ 0 32
Net loss                     0 0 (4,759) 0 (4,759)
Stock-based compensation                     $ 0 599 0 $ 0 599
Balance (in shares) at Jun. 30, 2023                     83,507,450     510,632  
Balance at Jun. 30, 2023                     $ 84 224,878 (208,642) $ (577) 15,743
Balance (in shares) at Dec. 31, 2023                     107,880,095     428,566  
Balance at Dec. 31, 2023                     $ 108 249,687 (223,215) $ (516) 26,064
Stock-based compensation                     $ 0 1,525 0 $ 0 1,525
Common stock issued to employees and directors, includes RSUs vesting and withholdings to satisfy tax withholdings on RSUs vesting (in shares)                     687,187     28,080  
Common stock issued to employees and directors, includes RSUs vesting and withholdings to satisfy tax withholdings on RSUs vesting                     $ 1 (516) 0 $ 156 $ (359)
Common stock issued for employee stock purchase plan sales (in shares)                     68,882       68,882
Common stock issued for employee stock purchase plan sales                     $ 0 35 0 0 $ 35
Common stock and warrants issued, net of transaction costs (in shares) 20,125,000         5,039,383       5,039,383          
Common stock and warrants issued, net of transaction costs $ 20 $ 7,286 $ 0 $ 0 $ 7,306 $ 5 2,537 0 0 $ 2,542          
Net loss                     0 0 (11,902) 0 (11,902)
Stock-based compensation                     $ 0 1,525 0 $ 0 1,525
Balance (in shares) at Jun. 30, 2024                     133,800,547     456,646  
Balance at Jun. 30, 2024                     $ 134 260,554 (235,117) $ (360) 25,211
Balance (in shares) at Mar. 31, 2024                     112,674,915     456,646  
Balance at Mar. 31, 2024                     $ 113 252,066 (228,967) $ (360) 22,852
Stock-based compensation                     $ 0 751 0 0 751
Common stock issued to employees and directors, includes RSUs vesting and withholdings to satisfy tax withholdings on RSUs vesting (in shares)                     47,978        
Common stock issued to employees and directors, includes RSUs vesting and withholdings to satisfy tax withholdings on RSUs vesting                     $ 0 0 0 0 0
Common stock issued for employee stock purchase plan sales (in shares)                     68,882        
Common stock issued for employee stock purchase plan sales                     $ 0 35 0 0 35
Common stock and warrants issued, net of transaction costs (in shares) 20,125,000         883,772                  
Common stock and warrants issued, net of transaction costs $ 20 $ 7,286 $ 0 $ 0 $ 7,306 $ 1 $ 416 $ 0 $ 0 $ 417          
Net loss                     0 0 (6,150) 0 (6,150)
Stock-based compensation                     $ 0 751 0 $ 0 751
Balance (in shares) at Jun. 30, 2024                     133,800,547     456,646  
Balance at Jun. 30, 2024                     $ 134 $ 260,554 $ (235,117) $ (360) $ 25,211