Note 10 - Leases - Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Rent expense (prior to adoption of ASC 842)		$ 2,149	$ 1,147
Operating lease costs	1,541
Short-term lease costs	302
Total lease costs, included in selling and administrative expenses	1,843	$ 2,149	$ 1,147
Operating cash flows – cash paid for operating lease liabilities	1,320
Non-cash – Operating lease right-of-use assets obtained in exchange for new lease liabilities	$ 782
Weighted-average remaining lease term (in years) (Year)	3 years 219 days
Weighted average discount rate	5.61%