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Notes Payable, Warrant issuances to Leviston and Five Institutions' in April, May and September 2021 (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 03, 2021
May 14, 2021
Apr. 20, 2021
Sep. 30, 2021
Dec. 31, 2021
Binomial Pricing Model [Member]          
Embedded Conversion Option Liability [Abstract]          
Principal       $ 2,446 $ 2,446
Fair Value of Conversion Option       4,138 6,255
Leviston Issuances [Member] | Binomial Pricing Model [Member]          
Embedded Conversion Option Liability [Abstract]          
Principal       1,902 1,902
Fair Value of Conversion Option       $ 3,206 $ 5,204
Leviston Issuances [Member] | Binomial Pricing Model [Member] | Measurement Input, Conversion Price [Member]          
Embedded Conversion Option Liability [Abstract]          
Conversion Price (in dollars per share)       $ 0.18 [1] $ 0.109 [2]
Leviston Issuances [Member] | Binomial Pricing Model [Member] | Measurement Input, Interest Rate (annual) [Member]          
Embedded Conversion Option Liability [Abstract]          
Derivative Liability, Measurement Input [3]       0.0007 0.0016
Leviston Issuances [Member] | Binomial Pricing Model [Member] | Measurement Input, Volatility (annual) [Member]          
Embedded Conversion Option Liability [Abstract]          
Derivative Liability, Measurement Input [4]       0.7310 3.0320
Leviston Issuances [Member] | Binomial Pricing Model [Member] | Measurement Input, Time to Maturity (Years) [Member]          
Embedded Conversion Option Liability [Abstract]          
Time to Maturity (Years)       1 year 4 months 24 days
Five Institution Issuances [Member] | Binomial Pricing Model [Member]          
Embedded Conversion Option Liability [Abstract]          
Principal       $ 544 $ 544
Fair Value of Conversion Option       $ 932 $ 1,051
Five Institution Issuances [Member] | Binomial Pricing Model [Member] | Measurement Input, Conversion Price [Member]          
Embedded Conversion Option Liability [Abstract]          
Conversion Price (in dollars per share)       $ 0.18 [1] $ 0.109 [2]
Five Institution Issuances [Member] | Binomial Pricing Model [Member] | Measurement Input, Interest Rate (annual) [Member]          
Embedded Conversion Option Liability [Abstract]          
Derivative Liability, Measurement Input [3]       0.0008 0.0026
Five Institution Issuances [Member] | Binomial Pricing Model [Member] | Measurement Input, Volatility (annual) [Member]          
Embedded Conversion Option Liability [Abstract]          
Derivative Liability, Measurement Input [4]       0.8010 2.4900
Five Institution Issuances [Member] | Binomial Pricing Model [Member] | Measurement Input, Time to Maturity (Years) [Member]          
Embedded Conversion Option Liability [Abstract]          
Time to Maturity (Years)       1 year 8 months 12 days
Leviston Warrants [Member]          
Leviston and Five Institutions Warrants [Abstract]          
Warrants issued (in shares) 1,322,751 3,968,254 3,968,254    
Five Institutions Warrants [Member]          
Leviston and Five Institutions Warrants [Abstract]          
Warrants to purchase additional common stock (in shares) 2,777,779        
[1] Based on the terms provided in the warrant agreement to purchase common stock of the Company on the stated issuance dates.
[2] Based on the terms provided in the warrant agreement to purchase common stock of the Company as of December 31, 2021.
[3] Interest rate for U.S. Treasury Bonds, as of each presented period ending date, as published by the U.S. Federal Reserve.Interest rate for U.S. Treasury Bonds, as of each presented period ending date, as published by the U.S. Federal Reserve.
[4] Based on the historical daily volatility of the Company as of each presented period ending date.Based on the historical daily volatility of the Company as of each presented period ending date.