Related-party transactions (Details Textual) (M-Power Development Ptd Ltd [Member], USD $)	Dec. 31, 2014
M-Power Development Ptd Ltd [Member]
Related Party Transaction [Line Items]
Capital Leases, Contingent Rental Payments Due	$ 71,426

Amount due based upon the occurrence of an event specified in the contractual terms.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Contingent Rentals

-URI http://asc.fasb.org/extlink&oid=6508509

Name:	us-gaap_CapitalLeasesContingentRentalPaymentsDue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant