Development and License Agreements - Summary of Prepaid R&D Asset and Manufacturing Efficiency Asset (Detail) - USD ($) $ in Thousands		Sep. 30, 2021	Dec. 31, 2020
Other Current Assets
Deferred Costs Capitalized Prepaid And Other Assets [Line Items]
Prepaid R&D asset	[1]	$ 262
Other Assets
Deferred Costs Capitalized Prepaid And Other Assets [Line Items]
Prepaid R&D asset	[2]	430	$ 2,088
Manufacturing efficiency asset	[2]	$ 1,703	$ 1,104

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

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