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Consolidated Balance Sheets (Parenthetical) - USD ($)
shares in Thousands, $ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Treasury stock, shares (in shares) 86 86
Series C Preferred Stock    
Preferred stock, par value (in dollars per share) $ 0.01 $ 0.01
Preferred stock, shares authorized (in shares) 20,000 20,000
Preferred stock, shares issued (in shares) 3,441 3,441
Preferred stock, shares outstanding (in shares) 3,441 3,441
Preferred stock, liquidation value $ 17,203 $ 17,203
Common Class A    
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 59,780 59,780
Common stock, shares issued (in shares) 8,102 7,953
Common stock, shares outstanding (in shares) 8,017 7,868
Common Class B    
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 220 220
Common stock, shares issued (in shares) 220 220
Common stock, shares outstanding (in shares) 220 220