XML 66 R51.htm IDEA: XBRL DOCUMENT v3.21.1
Stock-Based Compensation - Summary of Restricted Stock Activity (Details) - Restricted Stock
12 Months Ended
Dec. 31, 2020
$ / shares
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Number of Shares Underlying Outstanding Restricted Stock Awards, Unvested, December 31, 2019 | shares 14,625
Number of Shares Underlying Outstanding Restricted Stock Awards, Vested | shares 0
Number of Shares Underlying Outstanding Restricted Stock Awards, Unvested, December 31, 2020 | shares 14,625
Weighted Average Grant Date Fair Value, Unvested, December 31, 2019 | $ / shares $ 0.82
Weighted Average Grant Date Fair Value, Vested | $ / shares 0
Weighted Average Grant Date Fair Value, Unvested, December 31, 2020 | $ / shares $ 0.82