Note 11 - Factoring Arrangement (Details Textual) $ in Thousands, € in Millions	1 Months Ended
	Oct. 31, 2015	Jun. 30, 2019 USD ($)	Jun. 30, 2019 EUR (€)	Dec. 31, 2018 USD ($)
Due To Factor, Current		$ 209		$ 374
Eurofactor Hispania S.A.U [Member] | Factoring Agreement to Sell with Recourse [Member]
Factoring Agreement Maximum Outstanding Amount		$ 1,706	€ 1.5
Term of Agreement	1 year
Written Notice Period Prior to End of Current Term	90 days
Eurofactor Hispania S.A.U [Member] | Factoring Agreement to Sell with Recourse [Member] | Euro Interbank Offered Rate (EURIBOR) [Member]
Loans Receivable, Basis Spread on Variable Rate	2.00%
Eurofactor Hispania S.A.U [Member] | Factoring Agreement to Sell with Recourse [Member] | London Interbank Offered Rate (LIBOR) [Member]
Loans Receivable, Basis Spread on Variable Rate	2.00%