Development and License Agreements - Summary of Prepaid R&D Asset and Manufacturing Efficiency Asset (Detail) - USD ($) $ in Thousands		Jun. 30, 2020	Dec. 31, 2019
Other current assets
Deferred Costs Capitalized Prepaid And Other Assets [Line Items]
Prepaid R&D asset	[1]	$ 39	$ 54
Other assets
Deferred Costs Capitalized Prepaid And Other Assets [Line Items]
Prepaid R&D asset	[2]	2,106	2,094
Manufacturing efficiency asset	[2]	$ 1,226	$ 1,349

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

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