Net Assets in Liquidation - Schedule of GUC Trust Units (Detail)	3 Months Ended
	Sep. 30, 2017 Trust
Net Assets [Abstract]
Outstanding or issuable at beginning of period	31,855,453
Issued during the period	1,350
Less: Issuable at beginning of period	(1,350)
Add: Issuable at end of period	0
Outstanding or issuable at end of period	31,855,453