Development and License Agreements - Summary of Prepaid R&D Asset and Manufacturing Efficiency Asset (Detail) - USD ($) $ in Thousands		Dec. 31, 2020	Dec. 31, 2019
Other Current Assets
Deferred Costs Capitalized Prepaid And Other Assets [Line Items]
Prepaid R&D asset	[1]		$ 54
Other Assets
Deferred Costs Capitalized Prepaid And Other Assets [Line Items]
Prepaid R&D asset	[2]	$ 2,088	2,094
Manufacturing efficiency asset	[2]	$ 1,104	$ 1,349

[1] Included in “Prepaid and other current assets” in the Company's consolidated balance sheets.

[2] Included in “Other assets” in the Company's consolidated balance sheets.