Nature of Operations and Summary of Significant Accounting Policies - Narrative (Details) ¥ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($) installment	Dec. 31, 2014 USD ($) shares	Sep. 30, 2015 USD ($)	Jun. 30, 2015 CNY (¥)	Apr. 30, 2015 shares	Dec. 31, 2013 USD ($)	Oct. 19, 2007 shares
Property, Plant and Equipment [Line Items]
Cash and cash equivalents	$ 104,914,000	$ 44,816,000				$ 14,550,000
Cash	47,431,000	37,314,000
Cash equivalents	57,483,000	7,502,000
Inventory valuation reserves	29,000	18,000
Goodwill, impairment loss recorded	0	0
Deferred tax liability recorded against undistributed foreign earnings	2,789,000	0	$ 9,300,000
Loss on foreign exchange	$ 204,000	$ 202,000
Number of securities called by warrants | shares		88,097			88,097		3,141,499
Long-Term Incentive Plan, Payment Commencing in February of the Calendar Year Immediately Following the Conclusion of the Performance Period
Property, Plant and Equipment [Line Items]
Long-term incentive plan, percentage of award payable in cash	50.00%
Long-term incentive plan, number of installments | installment	35
Long-Term Incentive Plan, Payment Commencing in February 2021 and Ending in December 2023
Property, Plant and Equipment [Line Items]
Long-term incentive plan, percentage of award payable in cash	50.00%
Long-term incentive plan, number of installments | installment	35
Office Equipment | Minimum
Property, Plant and Equipment [Line Items]
Property, and equipment useful life	3 years
Office Equipment | Maximum
Property, Plant and Equipment [Line Items]
Property, and equipment useful life	5 years
Furniture and Fixtures | Minimum
Property, Plant and Equipment [Line Items]
Property, and equipment useful life	5 years
Furniture and Fixtures | Maximum
Property, Plant and Equipment [Line Items]
Property, and equipment useful life	7 years
Software | Minimum
Property, Plant and Equipment [Line Items]
Property, and equipment useful life	3 years
Software | Maximum
Property, Plant and Equipment [Line Items]
Property, and equipment useful life	5 years
Bank Deposit in Anticipation of Submitting Direct Selling License Application
Property, Plant and Equipment [Line Items]
Restricted cash	$ 3,100,000			¥ 20
China
Property, Plant and Equipment [Line Items]
Cash and cash equivalents	$ 4,400,000