Goodwill and Other Intangibles (Detail) |
9 Months Ended | ||
|---|---|---|---|
|
Sep. 30, 2017
USD ($)
reporting_unit
|
Sep. 30, 2016
USD ($)
|
Dec. 31, 2016
USD ($)
|
|
| Goodwill [Line Items] | |||
| Number of reporting units | reporting_unit | 2 | ||
| Goodwill | $ 2,116,000 | ||
| Goodwill impairments | $ 0 | $ 0 | |
| FUEL CHEM Segment | |||
| Goodwill [Line Items] | |||
| Goodwill | $ 2,116,000 | $ 2,116,000 | |