|
Summary of Significant Accounting Policies - Activity in Allowance for Doubtful Accounts (Detail) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2013
|
Dec. 31, 2012
|
Dec. 31, 2011
|
|
| Accounting Policies [Abstract] | |||
| Balance, beginning | $ 180 | $ 109 | $ 111 |
| Provision for bad debt | 116 | 100 | 85 |
| Uncollectible accounts written off | 27 | 29 | 87 |
| Balance, ending | $ 269 | $ 180 | $ 109 |