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Reconciliation of Denominators of Basic and Diluted Per Share Computations (Detail) - shares
shares in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Weighted average number of outstanding shares      
Basic 11,052 11,052 11,052
Effect of dilutive securities      
Employee share-based compensation 0 0 0
Diluted 11,052 11,052 11,052