Nature of Business and Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2015 USD ($) Manufacturer Customer $ / shares	Dec. 31, 2014 USD ($) $ / shares	Dec. 31, 2013 USD ($)
Basis Of Presentation [Line Items]
Common Stock, par value | $ / shares	$ 0.001	$ 0.001
Number of contract manufacturers | Manufacturer	2
Percentage of amount due to vendors payable	7.15%	12.30%
FDIC insurance coverage	$ 250,000
Net deposit amount exceeding specified amount under FDIC	$ 83,600,000	$ 70,500,000
Discount for prompt payment	2.00%
Percentage of prompt payment discount, accrued	100.00%
Allowance for prompt payment of discount	$ 50,000	50,000
Allowance for Doubtful Accounts Receivable	0	0
Allowance for Doubtful Accounts Receivable, Write-offs	0	0	$ 0
Inventory allowances recorded	0	0
Impairment loss		295,000
Impairment charges recognized on finite lived intangibles assets	0	0	0
Goodwill impairment charges	0	0	0
Deferred revenue related to sales	$ 1,900,000	800,000
Sales return maximum duration	18 months
Offered period for sales return prior to expiration	6 months
Offered period for sales return subsequent to expiration	12 months
Discount for prompt payment	2.00%
Number of large wholesalers | Customer	3
Percentage of accruals accounted by three large wholesalers	77.00%
Advertising expenses	$ 4,300,000	4,800,000	0
Shipping and handling costs	60,000	60,000	0
Debt Issuance Costs [Member]
Basis Of Presentation [Line Items]
Reclassification of debt issuance costs under the new accounting principle		800,000
Onsolis [Member]
Basis Of Presentation [Line Items]
Idle equipment net	3,700,000
Bunavail [Member]
Basis Of Presentation [Line Items]
Impairment loss	0	300,000	$ 0
Deferred cost of sales	$ 1,700,000	$ 700,000
Minimum [Member]
Basis Of Presentation [Line Items]
Period of payments from customers	30 days
Estimated useful lives of equipment	3 years
Accrual to payment cycle period	1 month
Maximum [Member]
Basis Of Presentation [Line Items]
Period of payments from customers	37 days
Estimated useful lives of equipment	10 years
Accrual to payment cycle period	3 months