Net Assets in Liquidation - Schedule of GUC Trust Units (Detail) - Trust	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Net Assets [Abstract]
Outstanding or issuable at beginning of year	31,853,758	31,853,702	31,853,702
Issued during the year	298	56	10,326
Less: Issuable at beginning of year			(10,326)
Add: Issuable at end of year	47
Outstanding or issuable at end of year	31,854,103	31,853,758	31,853,702