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NOTE 7 - Contracts with Customers (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2018
Dec. 31, 2017
Revenue from Contract with Customer [Abstract]    
Contract with Customer, Asset, Accumulated Allowance for Credit Loss $ 583 $ 425
Contract with Customer, Asset, Net 15,872 12,032
Deferred Sales Commission 2,565 $ 636
Amortization of Deferred Sales Commissions 396  
Deferred Revenue 3,290  
Revenue, Remaining Performance Obligation, Amount $ 25,494  
Revenue, Remaining Performance Obligation, Percentage 70.00%  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 12 months