XML 19 R42.htm IDEA: XBRL DOCUMENT
v2.4.0.6

CONCENTRATION OF CREDIT RISK (Details) | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Revenues | Largest customer |  |  |
CONCENTRATION OF CREDIT RISK |  |  |
Concentration risk percentage | 16.00% | 17.00% | 15.00%
Accounts receivable | Customer concentration risk | Two customers |  |  |
CONCENTRATION OF CREDIT RISK |  |  |
Number of customers | 2 | 2 | 2
Accounts receivable | Customer concentration risk | Customer One |  |  |
CONCENTRATION OF CREDIT RISK |  |  |
Concentration risk percentage | 29.00% | 13.00% | 18.00%
Accounts receivable | Customer concentration risk | Customer Two |  |  |
CONCENTRATION OF CREDIT RISK |  |  |
Concentration risk percentage | 23.00% | 12.00% | 11.00%
Purchases | Vendor concentration risk |  |  |
CONCENTRATION OF CREDIT RISK |  |  |
Concentration risk percentage | 12.00% |  |
Number of vendors | 1 |  |

X
- Definition Represents the number of major customers. + References No definition available. + Details
Name: | tge_NumberOfCustomers
Namespace Prefix: | tge_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of major vendors. + References No definition available. + Details
Name: | tge_NumberOfVendors
Namespace Prefix: | tge_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ConcentrationRiskLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13537-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13531-108611 + Details
Name: | us-gaap_ConcentrationRiskPercentage1
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration