Loans Payable - Banks (Details Narrative) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($)
Foreign Subsidiaries [Member]
Line of Credit Facility [Line Items]
Line of credit, maximum borrowing amount	$ 30,000
Foreign Subsidiaries [Member] | Euro Interbank Offered Rate [Member]
Line of Credit Facility [Line Items]
Variable rate	(0.36%)
Foreign Subsidiaries [Member] | Euro Interbank Offered Rate [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Basis spread over variable interest rate	0.50%
Foreign Subsidiaries [Member] | Euro Interbank Offered Rate [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Basis spread over variable interest rate	0.80%
Parent and Domestic Subsidiaries [Member]
Line of Credit Facility [Line Items]
Line of credit, maximum borrowing amount	$ 20,000
Maturity	Dec. 18, 2019
Parent and Domestic Subsidiaries [Member] | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Basis spread over variable interest rate	2.00%
Variable rate	2.51%