Note 9 - Debt and Other Financing Arrangements (Details Textual) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)
Long-term Debt, Total	$ 1,421	$ 1,421
Loan Agreement [Member]
Long-term Debt, Weighted Average Interest Rate, over Time	4.20%	4.20%
Interest Expense, Total	$ 17	$ 32
Debt Instrument, Interest Rate, Effective Percentage	4.20%	4.20%
Long-term Debt, Total	$ 1,400	$ 1,400