Net Assets in Liquidation - Schedule of GUC Trust Units (Detail) - Trust	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Net Assets [Abstract]
Outstanding or issuable as of beginning of year	31,854,103	31,853,758	31,853,702
Issued during the year	1,448	298	56
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	31,854,103	31,853,758