Investments and Fair Value Instruments - Summary of Fair Value of Investments Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Assets at Fair Value
Total Assets at Fair Value	$ 26,842	$ 23,707
Money Market Funds [Member]
Assets at Fair Value
Cash equivalents	26,842	12,082
Corporate Securities [Member]
Assets at Fair Value
Short-term investments		11,625
Level 1 [Member]
Assets at Fair Value
Total Assets at Fair Value	26,842	23,707
Level 1 [Member] | Money Market Funds [Member]
Assets at Fair Value
Cash equivalents	$ 26,842	12,082
Level 1 [Member] | Corporate Securities [Member]
Assets at Fair Value
Short-term investments		$ 11,625