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Stock-Based Compensation (Details 3) - Restricted stock awards
12 Months Ended
Dec. 31, 2020
$ / shares
shares
Number of Shares  
Unvested, December 31, 2019 | shares 450,000
Granted | shares 0
Released | shares (450,000)
Unvested, December 31, 2020 | shares 0
Weighted Average Grant Date Fair Value  
Unvested, December 31, 2019 | $ / shares $ 0.19
Granted | $ / shares 0
Released | $ / shares 0.19
Unvested, December 31, 2020 | $ / shares $ 0