Note 7 - Leases - Operating Lease Expenses (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Operating lease cost	$ 222	$ 445
Short-term lease cost	4	7
Sublease income	(55)	(109)
Total lease cost	$ 171	$ 343