Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $)	Nov. 30, 2011	May 31, 2011
Preferred stock, liquidation preference	$ 5,000,000	$ 5,000,000

The dollar amount of liquidation preference for preferred stockholders.

No definition available.

Name:	glgi_LiquidationPreferenceOfPreferredStock
Namespace Prefix:	glgi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant