Leases - Additional Information (Detail) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|---|
Sep. 30, 2017 |
Sep. 30, 2016 |
Sep. 30, 2017 |
Sep. 30, 2016 |
Dec. 31, 2016 |
|
| Leases [Line Items] | |||||
| Pump equipment | $ 14.0 | $ 13.9 | |||
| Accumulated depreciation related to leased assets | $ 5.3 | 5.3 | $ 3.9 | ||
| Operating lease rental expenses | $ 0.2 | $ 0.3 | $ 0.7 | $ 0.8 | |
| Capital Leases [Member] | |||||
| Leases [Line Items] | |||||
| Weighted average interest rate under capital leases | 3.60% | 3.60% | |||
| X | ||||||||||
- Definition Accumulated depreciation on pump equipment. No definition available.
|
| X | ||||||||||
- Definition Leases. No definition available.
|
| X | ||||||||||
- Definition Pump equipment net. No definition available.
|
| X | ||||||||||
- Definition Weighted average interest rate of debt outstanding. No definition available.
|
| X | ||||||||||
- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Details
|