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Pension and Other Post Retirement Benefit Plans - Reconciliation of Change in Benefit Obligation, Change in Plan Assets and Balance Sheet Classification (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Balance sheet classification:      
Pension benefit obligation $ (8,057) $ (7,211)  
United States      
Change in projected benefit obligation:      
Balance at beginning of year 3,832 4,218  
Interest cost 127 114 $ 111
Paid pension distributions (342) (342)  
Actuarial (gains) losses 254 (158)  
Balance at end of year 3,871 3,832 4,218
Change in plan assets:      
Funded Status (underfunded)/overfunded (3,871) (3,832)  
Balance sheet classification:      
Other current liabilities (342) (342)  
Pension benefit obligation (3,529) (3,490)  
Accumulated other comprehensive loss (pre-tax):      
Actuarial losses $ 476 $ 222  
Discount rate 2.40% 3.65%  
German Plan      
Change in projected benefit obligation:      
Balance at beginning of year $ 7,529 $ 7,927  
Interest cost 147 147 130
Paid pension distributions (285) (292)  
Actuarial (gains) losses 1,116 114  
Exchange rate impact (154) (367)  
Balance at end of year 8,353 7,529 7,927
Change in plan assets:      
Balance at beginning of year 3,808 3,891  
Actual return on plan assets 126 130  
Contributions 284 292  
Paid pension distributions (284) (292)  
Actuarial losses (30) (30)  
Exchange rate impact (79) (183)  
Balance at end of year 3,825 3,808 $ 3,891
Funded Status (underfunded)/overfunded (4,528) (3,721)  
Balance sheet classification:      
Pension benefit obligation (4,528) (3,721)  
Accumulated other comprehensive loss (pre-tax):      
Actuarial losses $ 3,398 $ 2,372  
Discount rate 1.06% 2.04%