Liquidating Distributions (Details Textual) (USD $) In Millions, except Share data, unless otherwise specified	Jun. 30, 2013
Liquidating Distributions (Textual) [Abstract]
Cash distributions	$ 0.6
New GM Stock [Member]
Liquidating Distributions (Textual) [Abstract]
GUC Trust distribution obligation	349,789
New GM Series A Warrants [Member]
Liquidating Distributions (Textual) [Abstract]
GUC Trust distribution obligation	317,941
New GM Series B Warrants [Member]
Liquidating Distributions (Textual) [Abstract]
GUC Trust distribution obligation	317,941
Cash Distribution [Member]
Liquidating Distributions (Textual) [Abstract]
Cash distributions	$ 0.6