Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Summary Of Significant Accounting Policies [Line Items]
Carrying value of short-term investments	$ 16,503	$ 22,520
Inventory reserve	350	464
Equipment, molds, furniture and fixtures, net	16,223	15,961
Accumulated depreciation	10,309	$ 9,769
Remaining performance obligations	$ 25,200
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Explanation	The Company expects to recognize revenue on the remaining performance obligations over the next five years.
Licensing and Development Revenue [Member]
Summary Of Significant Accounting Policies [Line Items]
Revenue recognized	$ 780
Teva [Member]
Summary Of Significant Accounting Policies [Line Items]
Future net profits from commercial sales percent	50.00%
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives	3 years
Royalty payment period	45 days
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives	10 years
Royalty payment period	60 days