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Debt and Leases - Leases (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Leases:      
Rental expense $ 767,000us-gaap_OperatingLeasesRentExpenseNet $ 800,000us-gaap_OperatingLeasesRentExpenseNet $ 994,000us-gaap_OperatingLeasesRentExpenseNet
Future minimum operating lease payments:      
2015 535,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent    
2016 539,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears    
2017 486,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears    
2018 328,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears    
2019 192,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears    
Thereafter 0us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter    
Total minimum lease payments $ 2,080,000us-gaap_OperatingLeasesFutureMinimumPaymentsDue    
Warehouse and distribution center      
Leases:      
Operating lease duration 5 years