Annual report pursuant to Section 13 and 15(d)

Property, Plant and Equipment - Additional Information (Detail)

v2.4.1.9
Property, Plant and Equipment - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
 0 Months Ended 12 Months Ended 0 Months Ended
Jun. 10, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 09, 2013
Operating Leased Assets [Line Items]          
Lease agreement expenses   $ 5.6us-gaap_LeaseAndRentalExpense $ 9.5us-gaap_LeaseAndRentalExpense $ 7.7us-gaap_LeaseAndRentalExpense  
Office space area of leased premises 4,421gifi_OfficeSpaceArea        
Lease commencement period Aug. 01, 2013        
Lease agreement period 64 months        
Extension of lease period 5 years        
Operating Lease Amendment [Member]          
Operating Leased Assets [Line Items]          
Office space area of leased premises         3,624gifi_OfficeSpaceArea
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= gifi_OperatingLeaseAmendmentMember
Lease expiration date         Jan. 31, 2020