Note 2 - Significant Accounting Policies (Details Textual) $ in Thousands	Jan. 16, 2018 USD ($)
Revenue, Remaining Performance Obligation, Amount	$ 6,000
Price Report, Formula and Sample [Member]
Revenue, Remaining Performance Obligation, Amount	1,750
Delivery and Installation of Equipment and Training [Member]
Revenue, Remaining Performance Obligation, Amount	2,000
License [Member]
Revenue, Remaining Performance Obligation, Amount	$ 2,250