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Investment in Sales Type Leases (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2020
Dec. 31, 2019
Capital Leased Assets [Line Items]    
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received $ 1,687 $ 2,078
Sales-type and Direct Financing Leases, Lease Receivable, Undiscounted Excess Amount 860 1,190
Net Investment in Lease 827 888
Net Investment in Lease, Current 435 452
Net Investment in Lease, Noncurrent $ 392 $ 436
Minimum    
Capital Leased Assets [Line Items]    
Lessors, Capital Leases, Term of contract 3 years  
Maximum    
Capital Leased Assets [Line Items]    
Lessors, Capital Leases, Term of contract 4 years