Description of Operations and Summary of Significant Accounting Policies- Revenue, Allowances & Advertising (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Product Revenues
Expired product return acceptance period prior to product expiration date	6 months
Expired product return acceptance period after product expiration date	12 months
Advertising expenses
Advertising expenses	$ 2,500	$ 4,000	$ 1,100
Sales allowances, discounts and chargebacks
Reserve activity
Balance at Beginning of Period	758	160
Charges	6,337	3,049
Deductions	(6,316)	(2,441)
Balance at End of Period	779	758	$ 160
Customer payments
Allowance for Doubtful Accounts
Allowance for doubtful accounts	$ 0	$ 0