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Business Combinations (Details Narrative)	Sep. 30, 2015
Falcon Secretaries Limited [Member]
Purchase of equity interest and assets percentage	100.00%
F&A [Member]
Purchase of equity interest and assets percentage	100.00%
Yabez [Member]
Purchase of equity interest and assets percentage	60.00%

X

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571

+ Details

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Balance Type:	na
Period Type:	instant

X

- Details

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X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=GRNQ_FAndAMember
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X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=GRNQ_YabezMember
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