Note 11 - Leases - Financial Statement Information (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Operating Lease, Right-of-Use Asset		$ 7,702	$ 10,049
Total leased assets		8,710
Operating lease liabilities, current		2,800	2,430
Operating lease liabilities , non-current		5,112	$ 7,759
Operating Lease, Liability, Total		7,912
Total finance lease liabilities		1,119
Finance lease cost		704
Finance lease cost		88
Operating lease cost		2,892
Operating cash flow		88
Financing cash flow		649
Operating cash flow		2,820
Operating Lease Assets [Member]
Operating Lease, Right-of-Use Asset		7,702
Operating Lease Liabilities [Member]
Operating lease liabilities, current		2,800
Accrued Liabilities, Current [Member]
Finance lease liabilities, current		541
Property and Equipment, Net [Member]
Finance Lease, Right-of-Use Asset	[1]	1,008
Operating Lease Liabilities, Net of Current Portion [Member]
Operating lease liabilities , non-current		5,112
Other Current Liabilities [Member]
Finance lease liabilities, non-current		$ 578

[1] Finance leases assets included in Property and equipment, net.