Commitments and Contingencies - Narrative (Details) ₩ in Millions	1 Months Ended	12 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2015 KRW (₩)	May. 31, 2013 USD ($)
Loss Contingencies [Line Items]
Rent expense for operating leases		$ 1,500,000	$ 777,000
Minimum monthly purchase amount					$ 40,000
Minimum annual purchase amount	$ 3,300,000		$ 3,300,000
Purchase commitment term	3 years
Purchase commitment renewal term	3 years
Korean Business Segment | Other Noncurrent Assets
Loss Contingencies [Line Items]
Distributor claims reserve		$ 190,000		₩ 223