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Current Expected Credit Losses - Amortized Cost Basis in Sales-Type Leases based on Payment Activity (Detail) - USD ($)
$ in Thousands
Jun. 30, 2020
Jan. 01, 2020
Dec. 31, 2019
Sales Type Lease Net Investment In Lease Credit Quality Indicator [Line Items]      
2020 $ 43    
2019 261    
2018 500    
2017 187    
2016 127    
Prior 14    
Net investment in sales-type leases 1,132 $ 1,600 $ 1,562
Payment Performance Performing      
Sales Type Lease Net Investment In Lease Credit Quality Indicator [Line Items]      
2020 43    
2019 261    
2018 500    
2017 187    
2016 127    
Prior 14    
Net investment in sales-type leases $ 1,132