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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
shares in Thousands, $ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Stockholders' equity:    
Preferred stock, par value (in dollars per share) $ 0.005 $ 0.005
Preferred stock, shares authorized (in shares) 1,000 1,000
Preferred stock, shares issued (in shares) 156 156
Preferred stock, shares outstanding (in shares) 156 156
Preferred stock, liquidation preference $ 156 $ 156
Common stock, par value (in dollars per share) $ 0.005 $ 0.005
Common stock, shares authorized (in shares) 100,000 100,000
Common stock, shares issued (in shares) 5,127 2,601
Common stock, shares outstanding (in shares) 5,127 2,601