Related party transactions (Details Textual) (USD $) In Thousands, unless otherwise specified		1 Months Ended
Sep. 30, 2013	Oct. 30, 2013 Subsequent Event [Member]
Related Party Transaction [Line Items]
Line of Credit Facility, Amount Outstanding	$ 100
Line Of Credit Facility Amount Paid		$ 50

Amount borrowed under the credit facility as of the balance sheet date.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

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