Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) $ in Thousands |
6 Months Ended | |
---|---|---|
Jun. 30, 2019
USD ($)
Segment
|
Dec. 31, 2018
USD ($)
|
|
Basis Of Presentation And Significant Accounting Policies [Line Items] | ||
Business segment | Segment | 2 | |
Contract assets | $ 91 | $ 19 |
Unearned amount to recognize in 2019 | 4,000 | |
Unearned amount to recognize in 2020 | 1,300 | |
Unearned amount to recognize, thereafter | 300 | |
Revenue from Contract with Customer [Member] | ||
Basis Of Presentation And Significant Accounting Policies [Line Items] | ||
Accounts receivable, Net of allowance | $ 6,800 | $ 6,400 |