Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Statements of Stockholders' Equity (Deficit) (Unaudited)

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Condensed Consolidated Statements of Stockholders' Equity (Deficit) (Unaudited) - USD ($)
$ in Thousands
Preferred Stock [Member]
Common Stock [Member]
Common Shares Issuable [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Total
Beginning balance, value at Dec. 31, 2020 $ 3 $ 5 $ 566,356 $ (595,797) $ (29,433)
Beginning balance, shares at Dec. 31, 2020 2,450,000 5,218,000      
Equity compensation to officers, employees, and board of directors $ 4 14,869 14,873
Equity compensation to officers and board of directors, shares   3,739,000        
Issuance of common stock for services $ 2 8,777 8,779
Issuance of common stock for services, shares   2,050,000        
Net loss (34,538) (34,538)
Common shares issued upon mandatory conversion of notes payable and accrued interest $ 8 $ 10,716 28,075 38,799
Common shares issued upon mandatory conversion of notes payable and accrued interest, shares   8,261,000 3,152,000      
Common shares issued upon exercise of warrants $ 3 16,293 16,296
Common shares issued upon exercise of warrants, shares   3,049,000        
Extinguishment of debt discount upon adoption of ASU 2020-06 (4,745) 226 (4,519)
Conversion of Preferred Series J-1 to common stock $ (2) $ 1 1
Stock Issued During Period, Shares, New Issues (2,354,000) 692,000        
Issuance of common stock in public offering, net of cost $ 5 24,674 24,679
Issuance of common stock in public offering, net of cost, shares   4,945,000        
Issuance of common stock for research and development agreement 1,355 1,355
Issuance of common stock for research and development agreement, shares   190,000        
Ending balance, value at Jun. 30, 2021 $ 1 $ 28 $ 10,716 655,655 (630,109) 36,291
Ending balance, shares at Jun. 30, 2021 96,000 28,144,000 3,152,000      
Beginning balance, value at Mar. 31, 2021 $ 1 $ 21 $ 25,956 623,287 (625,248) 24,017
Beginning balance, shares at Mar. 31, 2021 96,000 20,517,000 7,634,000      
Equity compensation to officers, employees, and board of directors 577 577
Equity compensation to officers and board of directors, shares   99,000        
Issuance of common stock for services 327 327
Issuance of common stock for services, shares   92,000        
Net loss (4,861) (4,861)
Common shares issued upon mandatory conversion of notes payable and accrued interest $ 4 $ (15,240) 15,232 (4)
Common shares issued upon mandatory conversion of notes payable and accrued interest, shares   4,482,000 (4,482,000)      
Common shares issued upon exercise of warrants $ 3 16,232 16,235
Common shares issued upon exercise of warrants, shares   2,954,000        
Ending balance, value at Jun. 30, 2021 $ 1 $ 28 $ 10,716 655,655 (630,109) 36,291
Ending balance, shares at Jun. 30, 2021 96,000 28,144,000 3,152,000      
Beginning balance, value at Dec. 31, 2021 $ 1 $ 32 $ 1,113 674,348 (653,584) 21,910
Beginning balance, shares at Dec. 31, 2021 96,000 32,062,000 327,000      
Cancellation of common stock
Cancellation of common stock, shares   (291,000)        
Equity compensation to officers, employees, and board of directors 910 910
Equity compensation to officers and board of directors, shares   164        
Issuance of common stock for services 1,262 1,262
Issuance of common stock for services, shares   277,000        
Net loss (8,419) (8,419)
Common shares issued- conversion of notes payable $ (1,113) 1,113
Common shares issued conversion of notes payable, shares   327,000 (327,000)      
Ending balance, value at Jun. 30, 2022 $ 1 $ 31 677,411 (662,003) 15,440
Ending balance, shares at Jun. 30, 2022 96,000 30,694,000      
Beginning balance, value at Mar. 31, 2022 $ 1 $ 32 676,780 (659,024) 17,789
Beginning balance, shares at Mar. 31, 2022 96,000 32,346,000      
Cancellation of common stock $ (1) (222) (223)
Cancellation of common stock, shares   (1,845,000)        
Equity compensation to officers, employees, and board of directors 463 463
Equity compensation to officers and board of directors, shares   79,000        
Issuance of common stock for services 390 390
Issuance of common stock for services, shares   114,000        
Net loss (2,979) (2,979)
Ending balance, value at Jun. 30, 2022 $ 1 $ 31 $ 677,411 $ (662,003) $ 15,440
Ending balance, shares at Jun. 30, 2022 96,000 30,694,000