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Shareholders' Equity
 3 Months Ended
Mar. 31, 2021
Shareholders’ Equity [Abstract]  
Shareholders' Equity 5. Shareholders’ Equity

We have had a stock repurchase program in place since 2008. Through March 31, 2021, our Board of Directors had authorized us to repurchase shares of our common stock with an aggregate purchase price of up to $2,900,000, which includes the most recent authorization of $100,000 announced on April 21, 2021. As of March 31, 2021, $153,792 remained available for share repurchases under these authorizations. Shares we repurchased are being held in treasury stock until they are reissued or retired at the discretion of our Board of Directors.

During the three months ended March 31, 2021, 31 shares of common stock at a total cost of $44,810 were netted and surrendered as payment for minimum statutory withholding obligations in connection with the vesting of outstanding stock awards. Shares surrendered by the participants in accordance with the applicable award agreements and plan are deemed repurchased by us but are not part of publicly announced share repurchase programs.