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Leases (Details) (USD $)
 9 Months Ended
Sep. 30, 2013
Leases [Abstract]  
Lease expiry year 2023-11
Lease renewal options Two five-year renewal options
Base monthly rent expense $ 129,000
Increase in base monthly rental expense per month 3
Increase in base monthly rental expenses per square foot 0.50
Monthly rent expense after January 2023 157,000
Lease rent escalation 2023-01
Annual rental expense 1,420,000
Refund from landlord 101,000
Tenant allowance 1,130,000
Allowance used for leasehold improvements 565,000
Amount used to apply to rent in month eight and beyond $ 565,000