|
Segment Information (Details 2) (USD $)
In Thousands, unless otherwise specified
|
3 Months Ended |
12 Months Ended |
|
Dec. 31, 2014
|
Sep. 30, 2014
|
Jun. 30, 2014
|
Mar. 31, 2014
|
Dec. 31, 2013
|
Sep. 30, 2013
|
Jun. 30, 2013
|
Mar. 31, 2013
|
Dec. 31, 2014
|
Dec. 31, 2013
|
Dec. 31, 2012
|
| Segment information |
|
|
|
|
|
|
|
|
|
|
|
| Revenue |
$ 17,533us-gaap_SalesRevenueNet
|
$ 17,445us-gaap_SalesRevenueNet
|
$ 17,146us-gaap_SalesRevenueNet
|
$ 16,921us-gaap_SalesRevenueNet
|
$ 16,914us-gaap_SalesRevenueNet
|
$ 17,627us-gaap_SalesRevenueNet
|
$ 18,821us-gaap_SalesRevenueNet
|
$ 24,001us-gaap_SalesRevenueNet
|
$ 69,045us-gaap_SalesRevenueNet
|
$ 77,363us-gaap_SalesRevenueNet
|
$ 83,098us-gaap_SalesRevenueNet
|
| Long-lived assets |
3,590us-gaap_PropertyPlantAndEquipmentNet
|
|
|
|
4,660us-gaap_PropertyPlantAndEquipmentNet
|
|
|
|
3,590us-gaap_PropertyPlantAndEquipmentNet
|
4,660us-gaap_PropertyPlantAndEquipmentNet
|
|
| United States |
|
|
|
|
|
|
|
|
|
|
|
| Segment information |
|
|
|
|
|
|
|
|
|
|
|
| Revenue |
|
|
|
|
|
|
|
|
66,045us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= country_US
|
68,179us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= country_US
|
80,802us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= country_US
|
| Long-lived assets |
3,570us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_US
|
|
|
|
4,611us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_US
|
|
|
|
3,570us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_US
|
4,611us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_US
|
|
| Other countries |
|
|
|
|
|
|
|
|
|
|
|
| Segment information |
|
|
|
|
|
|
|
|
|
|
|
| Revenue |
|
|
|
|
|
|
|
|
3,000us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= country_XX
|
9,184us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= country_XX
|
2,296us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= country_XX
|
| Long-lived assets |
$ 20us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_XX
|
|
|
|
$ 49us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_XX
|
|
|
|
$ 20us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_XX
|
$ 49us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_XX
|
|