Note 4 - Other Accounts Receivable and Prepaid Expenses - Other Accounts Receivable and Prepaid Expenses (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Prepaid expenses	$ 1,612	$ 1,262
Tax and governmental receivables	1,019	606
Deposits	249	304
Others	287	159
	$ 3,167	$ 2,331