Net Assets in Liquidation - Schedule of GUC Trust Units (Detail) - Trust	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Outstanding or issuable as of beginning of year	31,855,504	31,854,103	31,853,758
Issued during the year		1,448	298
Less: Issuable as of beginning of year		(47)
Add: Issuable as of end of year			47
Outstanding or issuable as of end of year	31,855,504	31,855,504	31,854,103