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Restricted Stock, Stock Options and Other Stock Plans (Tables)
 6 Months Ended
Jun. 30, 2021
Share-based Payment Arrangement [Abstract]  
Summary of Consolidated Balance Sheets and Statements of Operations Line Items for Stock-Based Compensation The following table reflects the Condensed Consolidated Statements of Operations line items for stock-based compensation for the periods presented:
Three Months Ended June 30,Six Months Ended June 30,
2021202020212020
General and administrative $154 $182 $306 $373