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Stock-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2021
Share-based Payment Arrangement [Abstract]  
Unrecognized compensation expense is expected to be recognized At June 30, 2021, the Company had unrecognized compensation expense of $2,429 related to granted but unvested stock awards, which is to be recognized as follows:
Remainder of 2021$1,058 
2022858 
2023509 
20243 
20251 
 Total$2,429 
Summary of restricted stock activity The following table summarizes restricted stock activity under the Plans from December 31, 2020 through June 30, 2021:
 Number of
Shares		Weighted
Average
Unvested, December 31, 20201,886 $5.14 
Granted14 $3.07 
Vested(321)$8.34 
Forfeited(130)$6.35 
Unvested, June 30, 20211,449 $3.26