Quarterly report pursuant to Section 13 or 15(d)

Cash Flow Statement - Additional Information (Detail)

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Cash Flow Statement - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2019
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Interest paid     $ 9 $ 8
Income taxes paid     27 (74)
Issuance of treasury stock $ 49 $ 79    
Capital expenditures     10 242
Employee Stock Purchase Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Issuance of treasury stock     $ 49 $ 79