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Discontinued Operations - Schedule of Net Income From Discontinued Operations (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Costs and expenses:        
Net income from discontinued operations, net of tax $ 29,741 $ 348 $ 28,061 $ 3,150
Net income from discontinued operations per common share        
Basic (in shares) $ 1.59 $ 0.02 $ 1.51 $ 0.17
Diluted (in shares) $ 1.59 $ 0.02 $ 1.51 $ 0.17
Weighted average number of common shares outstanding:        
Basic (in shares) 18,706,000 18,341,000 18,574,000 18,152,000
Diluted (in shares) 18,706,000 18,566,000 18,574,000 18,152,000
Discontinued Operations, Disposed of by Sale        
Sales:        
Sales $ 1,494 $ 8,596 $ 16,721 $ 29,989
Costs and expenses:        
Research and development 374 1,507 3,147 5,137
Sales, marketing and support 348 1,261 3,035 3,885
Other income, net 12 34 81 101
(Loss) income from discontinued operations before income tax expense (889) 348 (2,569) 3,150
Gain on sale of discontinued operations before tax expense 30,858 0 30,858 0
Total income from discontinued operations before tax expense 29,969 348 28,289 3,150
Income tax expense on discontinued operations 228 0 228 0
Net income from discontinued operations, net of tax $ 29,741 $ 348 $ 28,061 $ 3,150
Net income from discontinued operations per common share        
Basic (in shares) $ 1.59 $ 0.02 $ 1.51 $ 0.17
Diluted (in shares) $ 1.59 $ 0.02 $ 1.51 $ 0.17
Weighted average number of common shares outstanding:        
Basic (in shares) 18,706,000 18,341,000 18,574,000 18,152,000
Diluted (in shares) 18,706,000 18,566,000 18,574,000 18,152,000
Discontinued Operations, Disposed of by Sale | Product        
Sales:        
Sales $ 1,276 $ 8,388 $ 16,042 $ 29,152
Costs and expenses:        
Cost of sales 1,504 5,341 12,732 17,168
Discontinued Operations, Disposed of by Sale | Service        
Sales:        
Sales 218 208 679 837
Costs and expenses:        
Cost of sales $ 169 $ 173 $ 457 $ 750