Financing Obligations (Details Textuals 4) (Equipment Loan, USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Equipment Loan
Line of Credit Facility [Line Items]
Term of capital lease			3 years
Total amount of remaining lease payments to be paid on capital lease, including interest and taxes	$ 1,300,000		$ 1,300,000		$ 606,000
Repayment of principal outstanding of Capital Lease	103,000	77,000	216,000	142,000
Interest expenses of Capital Lease	$ 17,000	$ 6,000	$ 27,000	$ 11,000