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Stockholders' Equity (Restricted Stock Activity) (Details) - Restricted Stock [Member]
3 Months Ended
Mar. 31, 2022
$ / shares
shares
Shares  
Beginning balance | shares 65,100
Granted | shares 240,777
Vested | shares (121,232)
Ending balance | shares 184,645
Weighted average grant date fair value  
Beginning balance | $ / shares $ 4.10
Granted | $ / shares 1.52
Vested | $ / shares 2.14
Ending balance | $ / shares $ 2.03