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The options outstanding as of June 30, 2021, have been classified by exercise price, as follows (Details)
6 Months Ended
Jun. 30, 2021
$ / shares
shares
Issuances Outside Of Plans [Member]  
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]  
Weighted Average Exercise Price, Exercisable $ 1.79
Options Outstanding | shares 850,000
Weighted Average Remaining Contractual Life (Years) 9 years 2 months 19 days
Weighted Average Exercise Price, Outstanding $ 1.79
Options, Exercisable | shares 0
Weighted Average Exercise Price, Exercisable $ 0.00
Total Options [Member]  
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]  
Weighted Average Exercise Price, Exercisable 480
Exercise Price, upper limit $ 1,856
Options Outstanding | shares 850,919
Weighted Average Remaining Contractual Life (Years) 9 years 2 months 19 days
Weighted Average Exercise Price, Outstanding $ 2.39
Options, Exercisable | shares 759
Weighted Average Exercise Price, Exercisable $ 558.88
Exercise Price Range $480.00 - $560.00 [Member]  
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]  
Weighted Average Exercise Price, Exercisable 480
Exercise Price, upper limit $ 560
Options Outstanding | shares 894
Weighted Average Remaining Contractual Life (Years) 4 years 5 months 12 days
Weighted Average Exercise Price, Outstanding $ 537.34
Options, Exercisable | shares 734
Weighted Average Exercise Price, Exercisable $ 532.43
Exercise Price Range 2 [Member]  
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]  
Weighted Average Exercise Price, Exercisable 1,208
Exercise Price, upper limit $ 1,352
Options Outstanding | shares 25
Weighted Average Remaining Contractual Life (Years) 2 years 9 months
Weighted Average Exercise Price, Outstanding $ 1,336.00
Options, Exercisable | shares 25
Weighted Average Exercise Price, Exercisable $ 1,336.00
Exercise Price Range $1,208.00 - $1,352.00 [Member]  
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]  
Weighted Average Exercise Price, Exercisable 480
Exercise Price, upper limit $ 1,352
Options Outstanding | shares 919
Weighted Average Remaining Contractual Life (Years) 4 years 4 months 24 days
Weighted Average Exercise Price, Outstanding $ 559.07
Options, Exercisable | shares 759
Weighted Average Exercise Price, Exercisable $ 558.88