Note 1 - Business and Basis of Presentation (Details Textual) $ in Thousands	Nov. 06, 2018 USD ($)	Mar. 31, 2019 USD ($)	Jan. 01, 2019 USD ($)	Dec. 31, 2018 USD ($)
Entity Number of Employees	210
Number of Continents	3
Accounts Receivable, after Allowance for Credit Loss, Current, Total		$ 10,153		$ 9,158
Operating Lease, Right-of-Use Asset		7,223
Operating Lease, Liability, Total		$ 8,267
Accounting Standards Update 2016-02 [Member]
Operating Lease, Right-of-Use Asset			$ 7,200
Operating Lease, Liability, Total			$ 8,200
Quest [Member]
Proceeds from Divestiture of Businesses	$ 170,000