Commitments and Contingencies (Details Textual) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2013	Mar. 31, 2012
Commitments and Contingencies (Textual) [Abstract]
Operating leases expenses	$ 362	$ 288
Period in which office lease expires	Jan. 01, 2014
Stand by letter of credit amount		700
Stand by letter of credit decreased		419
Litigation expenses incurred		$ 672

Rental expense incurred for leased assets including furniture and equipment which has not been recognized in costs and expenses applicable to sales and revenues; for example, cost of goods sold or other operating costs and expenses.

No definition available.

Name:	us-gaap_LeaseAndRentalExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration