Consolidated Statements of Operations and Comprehensive Income (Parenthetical) (USD $)	12 Months Ended
Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Income Statement [Abstract]
Release of unrealized loss on available-for-sale investments, tax, upon disposal	$ 0
Unrealized gain on available-for-sale investments, tax	$ 0	$ 0	$ 0

Other comprehensive income release of unrealized loss on available for sale investments tax portion.

No definition available.

Name:	gai_OtherComprehensiveIncomeReleaseOfUnrealizedLossOnAvailableForSaleInvestmentsTaxPortion
Namespace Prefix:	gai_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration