Note 7 - Restructuring and Other Merger Related Cost (Details Textual) $ in Thousands	Jun. 30, 2019 USD ($)
Employee Severance [Member] | Aegis Transaction Agreement [Member]
Restructuring and Related Cost, Expected Cost Remaining	$ 673
Employee Severance [Member] | Closure of Site in Argentina [Member]
Restructuring and Related Cost, Expected Cost Remaining	144
Facility Closing [Member] | Aegis Transaction Agreement [Member]
Restructuring and Related Cost, Expected Cost Remaining	849
Facility Closing [Member] | Closure of Site in Argentina [Member]
Restructuring and Related Cost, Expected Cost Remaining	$ 109