Quarterly report pursuant to Section 13 or 15(d)

Organization and Accounting Policies (Rollforward Analysis of the Allowance Against Accounts Receivable Balance) (Details)

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Organization and Accounting Policies (Rollforward Analysis of the Allowance Against Accounts Receivable Balance) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Organization and Accounting Policies [Abstract]    
Balance at beginning of year $ (1,508) $ (2,535)
Bad debt recovery (charge) (810) 29
Adjustment associated with reversal of allowance on Mutamba receivable 593  
Adjustment associated with settlement of customs audit   623
Foreign currency gain   29
Balance at end of period $ (1,725) $ (1,854)