Capital Lease Obligations (Details Textual)	6 Months Ended
Jun. 30, 2012
Capital lease obligation (Textual)
Non-cancelable capital lease expiration date	Jun. 03, 2014

Date which lease or group of leases is set to expire, in CCYY-MM-DD format.

No definition available.

Name:	us-gaap_LeaseExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration