Commitments and Contingencies - Narrative (Details) ₩ in Millions |
12 Months Ended | |||
|---|---|---|---|---|
|
Dec. 31, 2016
USD ($)
|
Dec. 31, 2015
USD ($)
|
Dec. 31, 2014
USD ($)
|
Dec. 31, 2016
KRW (₩)
|
|
| Loss Contingencies [Line Items] | ||||
| Rent expense for operating leases | $ 1,800,000 | $ 1,500,000 | $ 777,000 | |
| Minimum monthly purchase amount | 40,000 | |||
| Minimum annual purchase amount | $ 9,400,000 | |||
| Purchase commitment term | 3 years | |||
| Purchase commitment renewal term | 3 years | |||
| Korean Business Segment | Other Noncurrent Assets | ||||
| Loss Contingencies [Line Items] | ||||
| Distributor claims reserve | $ 185,000 | ₩ 223 | ||