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Accrued Expenses
12 Months Ended
Dec. 31, 2018
Accrued expenses [Abstract]  
Accrued Expenses Disclosure [Text Block]

18. Accrued Expenses

Accrued expenses consist of:

December 31,
20182017
(in thousands)
Compensation and payroll$2,896$1,540
Professional fees536579
Warranty costs391246
Local taxes, including VAT423376
Customer credits372310
Interest 48033
Rent 255388
Other409344
Total$5,762$3,816