v2.4.0.8
Net Investment in Sales-Type Leases sales type lease - from min payments to non current investment (Details) (USD $)
Sep. 30, 2013
Dec. 31, 2012
Sep. 30, 2012
Net Investment in Sales-Type Leases [Abstract]      
Net minimum lease payments to be received $ 18,788,000 $ 19,665,000  
Less unearned interest income portion 1,157,000 1,205,000  
Net investment in sales-type leases 17,631,000 18,460,000  
Less current portion 5,233,000 5,232,000  
Non-current net investment in sales-type leases 12,398,000 13,228,000 12,398,000
Allowance for doubtful accounts (Notes), Current 100,000 500,000  
Allowance for doubtful accounts (Notes), Non-current $ 100,000 $ 100,000