Commitments and Contingencies (Details 2) (ClearPoint, USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
ClearPoint
ClearPoint - Acquisition
Accrued contingent obligation recorded in accrued compensation	$ 0.4	$ 0.8

Represents the accrued contingent obligation which is contingent upon the continued employment of the former stockholder, recorded in accrued compensation.

No definition available.

Name:	glch_BusinessAcquisitionAccruedContingentConsiderationRecordedInAccruedCompensation
Namespace Prefix:	glch_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant