Acquisitions (Details) - USD ($) $ in Thousands |
Feb. 27, 2017 |
Dec. 31, 2017 |
Sep. 30, 2017 |
Feb. 28, 2017 |
|---|---|---|---|---|
| Business Acquisition [Line Items] | ||||
| Cash acquired in acquisition | $ 300 | |||
| Business acquisitions holdback liability | $ 1,400 | |||
| Business acquisitions holdback liability | $ 1,414 | $ 1,100 | ||
| Triad Holdings, Inc. | ||||
| Business Acquisition [Line Items] | ||||
| Purchase price to acquire common stock | $ 9,200 | |||
| Purchase agreement, portion of purchase price held, period from acquisition date (in months) | 18 months |