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Stock-Based Compensation - Summary of Performance Based Grant Activity (Details) - Performance-Based Restricted Stock Grants
9 Months Ended
Sep. 30, 2020
$ / shares
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Unvested Beginning, Stock | shares 27,739
Granted, Stock | shares 15,025
Vested, Stock | shares (8,000)
Unvested Ending, Stock | shares 34,764
Unvested Beginning, Weighted-Average Grant-Date Fair Value | $ / shares $ 4.21
Granted, Weighted-Average Grant-Date Fair Value | $ / shares 3.58
Vested, Weighted-Average Grant-Date Fair Value | $ / shares 4.25
Unvested Ending, Weighted-Average Grant-Date Fair Value | $ / shares $ 3.93