Stockholders' Equity - Summary of Share-Based Compensation Expense (Detail) - USD ($)
$ in Thousands |
12 Months Ended |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |
|
|
|
| Related deferred income tax benefits |
$ 0
|
$ 0
|
$ 0
|
| Share-based compensation expense |
288
|
218
|
86
|
| Sales, General and Administrative [Member] |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |
|
|
|
| Total SG&A |
288
|
218
|
86
|
| Non-employee Directors [Member] | Sales, General and Administrative [Member] |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |
|
|
|
| Total SG&A |
62
|
47
|
19
|
| Officer Compensation [Member] | Sales, General and Administrative [Member] |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |
|
|
|
| Total SG&A |
130
|
97
|
39
|
| Others [Member] | Sales, General and Administrative [Member] |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |
|
|
|
| Total SG&A |
$ 96
|
$ 74
|
$ 28
|