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Net Income Per Common Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Net Income (Loss) Available to Common Stockholders        
Net Income (Loss) Attributable to Parent $ (3,312) $ 3,343 $ 4,230 $ 9,032
Less: net income allocated to participating securities 0 207 234 438
Net income (loss) available to common shareholders $ (3,312) $ 3,136 $ 3,996 $ 8,594
Weighted average common shares outstanding - basic (in shares) 8,053,000 7,969,000 8,015,000 7,922,000
Effect of dilutive securities (in shares) 0 0 32,000 0
Weighted average common and potentially issuable common shares outstanding - diluted (in shares) 8,053,000 7,969,000 8,047,000 7,922,000
Basic net income per share (in dollars per share) $ (0.41) $ 0.39 $ 0.50 $ 1.08
Diluted net income per share (in dollars per share) $ (0.41) $ 0.39 $ 0.50 $ 1.08
Participating Securities        
Net Income (Loss) Available to Common Stockholders        
Less: net income allocated to participating securities $ 0 $ 207 $ 234 $ 438
Weighted average common shares outstanding - basic (in shares) 0 526,000 470,000 404,000
Effect of dilutive securities (in shares) 0 0 0 0
Weighted average common and potentially issuable common shares outstanding - diluted (in shares) 0 526,000 470,000 404,000
Basic net income per share (in dollars per share) $ 0.00 $ 0.39 $ 0.50 $ 1.08
Diluted net income per share (in dollars per share) $ 0.00 $ 0.39 $ 0.50 $ 1.08