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Net Loss Per Share - Computation of Net Loss Per Share Basic and Diluted (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Numerator:        
Net loss applicable to common stockholders $ (2,744) $ (1,531) $ (7,220) $ (3,113)
Denominator:        
Basic net loss per Class A and Class B share applicable to common stockholders $ (0.06) $ (0.03) $ (0.17) $ (0.07)
Diluted net loss per Class A and Class B share applicable to common stockholders $ (0.06) $ (0.03) $ (0.17) $ (0.07)
Class A        
Numerator:        
Net loss applicable to common stockholders $ (301) $ (165) $ (792) $ (335)
Diluted net income from discontinued operations, net of tax     $ (792) $ (335)
Diluted net loss applicable to common stockholders $ (301) $ (165)    
Denominator:        
Weighted average number of shares outstanding used to calculate basic net loss per share 4,661 4,661 4,661 4,661
Weighted average number of shares outstanding used to calculate diluted net loss per share 4,661 4,661 4,661 4,661
Basic net loss per Class A and Class B share applicable to common stockholders $ (0.06) $ (0.03) $ (0.17) $ (0.07)
Diluted net loss per Class A and Class B share applicable to common stockholders $ (0.06) $ (0.03) $ (0.17) $ (0.07)
Class B        
Numerator:        
Net loss applicable to common stockholders $ (2,443) $ (1,366) $ (6,428) $ (2,778)
Reallocation of discontinued operations for Class A shares as a result of conversion of Class A to Class B shares     (792) (335)
Reallocation of net loss for Class A shares as a result of conversion of Class A to Class B shares (301) (165)    
Diluted net income from discontinued operations, net of tax     $ (7,220) $ (3,113)
Diluted net loss applicable to common stockholders $ (2,744) $ (1,531)    
Denominator:        
Weighted average number of shares outstanding used to calculate basic net loss per share 37,840 38,696 37,837 38,670
Conversion of Class A to Class B common shares outstanding 4,661 4,661 4,661 4,661
Weighted average number of shares outstanding used to calculate diluted net loss per share 42,501 43,357 42,498 43,331
Basic net loss per Class A and Class B share applicable to common stockholders $ (0.06) $ (0.03) $ (0.17) $ (0.07)
Diluted net loss per Class A and Class B share applicable to common stockholders $ (0.06) $ (0.03) $ (0.17) $ (0.07)