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Note 20 - Income Tax - Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Computed "expected" income tax benefit	$ (1,161)	$ (1,674)
Permanent differences, net	241	(117)
Foreign tax rate differential	42	(11)
State income taxes, net of federal income tax benefit	(74)	(121)
Non-deductible stock compensation expense	205	(329)
Acquisition costs	3	438
Tax credits	220	(242)
Change in reserve for uncertain tax position	(111)	203
Impact of change to prior year tax accruals	314	100
Change in valuation allowance allocated to income tax benefit	(578)	(1,850)
Other	84	(73)
Total income tax benefit	$ (815)	$ (3,676)

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