Quarterly report pursuant to Section 13 or 15(d)

Loss Per Share - Additional Information (Detail)

v3.10.0.1
Loss Per Share - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Contingent Consideration Cash Payments $ 0.2   $ 0.2
Potentially dilutive shares included in the computation of basic and diluted earnings per share 26,669   26,669
Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Antidilutive number of options outstanding   24,875 24,928
Average exercise price $ 44.45 $ 44.45 $ 44.45