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Discontinued Operations - Schedule of Net Income From Discontinued Operations (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Costs and expenses:    
Net loss from discontinued operations, net of tax $ 0 $ (425)
Net loss from discontinued operations per common share    
Basic (in shares) $ 0.00 $ (0.02)
Diluted (in shares) $ 0.00 $ (0.02)
Weighted average number of common shares outstanding:    
Basic (in shares) 18,882,000 18,449,000
Diluted (in shares) 18,882,000 18,449,000
Discontinued Operations, Disposed of by Sale    
Sales:    
Sales   $ 7,943
Costs and expenses:    
Research and development   1,638
Sales, marketing and support   1,388
Loss from discontinued operations before income tax expense   (460)
Other income, net   35
Loss from discontinued operations before tax expense   (425)
Income tax expense on discontinued operations   0
Net loss from discontinued operations, net of tax   $ (425)
Net loss from discontinued operations per common share    
Basic (in shares)   $ (0.02)
Diluted (in shares)   $ (0.02)
Weighted average number of common shares outstanding:    
Basic (in shares)   18,449,000
Diluted (in shares)   18,449,000
Discontinued Operations, Disposed of by Sale | Product    
Sales:    
Sales   $ 7,807
Costs and expenses:    
Cost of sales   5,311
Discontinued Operations, Disposed of by Sale | Service    
Sales:    
Sales   136
Costs and expenses:    
Cost of sales   $ 66