Balance Sheet Items - Property and Equipment, Net (Detail) - USD ($)
$ in Thousands |
Dec. 31, 2016 |
Dec. 31, 2015 |
| Property, Plant and Equipment [Line Items] |
|
|
| Total property and equipment |
$ 41,892
|
$ 48,706
|
| Less: accumulated depreciation and amortization |
(30,956)
|
(40,082)
|
| Property and equipment, net |
10,936
|
8,624
|
| Land and building [Member] |
|
|
| Property, Plant and Equipment [Line Items] |
|
|
| Total property and equipment |
3,675
|
1,816
|
| Computer equipment and office furniture [Member] |
|
|
| Property, Plant and Equipment [Line Items] |
|
|
| Total property and equipment |
7,678
|
13,401
|
| Computer software [Member] |
|
|
| Property, Plant and Equipment [Line Items] |
|
|
| Total property and equipment |
1,795
|
2,405
|
| Internal use software and website development [Member] |
|
|
| Property, Plant and Equipment [Line Items] |
|
|
| Total property and equipment |
11,207
|
9,636
|
| Internal use software and website development in progress [Member] |
|
|
| Property, Plant and Equipment [Line Items] |
|
|
| Total property and equipment |
849
|
2
|
| Production equipment [Member] |
|
|
| Property, Plant and Equipment [Line Items] |
|
|
| Total property and equipment |
13,685
|
18,595
|
| Leasehold improvements [Member] |
|
|
| Property, Plant and Equipment [Line Items] |
|
|
| Total property and equipment |
$ 3,003
|
$ 2,851
|