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UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - shares
Mar. 31, 2021
Dec. 31, 2020
Stockholders’ equity:    
Preferred stock, shares authorized (in shares) 1,000,000 1,000,000
Preferred stock, shares issued (in shares) 0 0
Common stock, shares authorized (in shares) 200,000,000 200,000,000
Common stock, shares issued (in shares) 81,246,000 80,890,000
Common stock, shares outstanding (in shares) 81,246,000 80,890,000