Summary of Significant Accounting Policies - Summary of Consideration Received, Consideration Transferred and Resulting Net Gain on Deconsolidation (Detail) - Cabs Joint Venture - USD ($) $ in Thousands		1 Months Ended	12 Months Ended
	Nov. 01, 2019	Nov. 30, 2019	May 31, 2020
Schedule Of Equity Method Investments [Line Items]
Retained investment (at fair value)	$ 13,831
Contributed net assets (at carrying value)	13,394
Gain on deconsolidation	437
Less: deal costs	(179)
Net gain on deconsolidation	$ 258	$ 50	$ 208