Nature of Business and Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2021 USD ($) contractManufacturingSite $ / shares	Dec. 31, 2020 USD ($) $ / shares	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Basis Of Presentation [Line Items]
Common stock, par value (in dollars per share) | $ / shares	$ 0.001	$ 0.001
Preferred stock, par value (in dollars per share) | $ / shares	$ 0.001
Cash	$ 114,300,000	$ 111,584,000
Net cash flows from operating activities	41,000,000
Stockholders' equity	187,822,000	108,234,000	$ 69,764,000	$ 29,742,000
Allowance for doubtful accounts receivable	10,000.00	10,000.00
Inventory reserve	4,180,000	2,254,000
Depreciation	100,000	500,000	1,800,000
Impairment charges recognized on finite lived intangibles assets	0	0	0
Goodwill impairment charges	$ 0	0	0
Sales return maximum duration (in months)	18 months
Offered period for sales return prior to expiration (in months)	6 months
Offered period for sales return subsequent to expiration (in months)	12 months
Number of contract manufacturing sites | contractManufacturingSite	3
Advertising expenses	$ 20,900,000	11,000,000	10,800,000
Shipping and handling costs	23,373,000	24,665,000	21,590,000
Unrecognized tax benefits	0	0
Accruals for interest and penalties	0
Trade receivables	$ 56,900,000
Accounts receivable outstanding, percentage	95.00%
BUNAVAIL
Basis Of Presentation [Line Items]
Depreciation		300,000	1,500,000
Impairment loss	$ 0	300,000
Reserve liability, product returns			2,200,000
Shipping and Handling
Basis Of Presentation [Line Items]
Shipping and handling costs	$ 50,000.00	$ 30,000.00	$ 30,000.00
Minimum
Basis Of Presentation [Line Items]
Estimated useful lives of property and equipment	3 years
Maximum
Basis Of Presentation [Line Items]
Estimated useful lives of property and equipment	10 years