Annual report pursuant to Section 13 and 15(d)

Excess Lease Liability (Details Textual)

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Excess Lease Liability (Details Textual) (USD $)
3 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2012
Dec. 31, 2011
Excess Lease Liability (Textual) [Abstract]      
Estimated value of excess lease facility liability $ 4,586,000 $ 4,586,000 $ 7,039,000
Amortization of excess lease facility   (796,000)  
Excess Lease Facility [Member]
     
Excess Lease Liability (Textual) [Abstract]      
Estimated value of excess lease facility liability 4,600,000 4,600,000 7,000,000
Amortization of excess lease facility   700,000  
Reduction in excess lease liability $ 1,700,000