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Schedule of Lease Amounts Paid to Related Parties (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Amount Charged on Leased Premises $ 163 $ 122
Lease Amounts [Member] | Foster City, CA [Member]    
Amount Charged on Leased Premises 114 114
Lease Amounts [Member] | Edwardsville, IL [Member]    
Amount Charged on Leased Premises $ 49 $ 8