Goodwill and Intangible Assets - Additional Information (Details) - USD ($) |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
Dec. 31, 2015 |
|
| Goodwill And Intangible Assets Disclosure [Abstract] | |||||
| Goodwill | $ 989,000 | $ 989,000 | $ 989,000 | ||
| Amortization of intangible assets | $ 98,000 | $ 77,000 | $ 284,000 | $ 232,000 | |