Note 13 - Income Taxes - Components of Provision (Benefit) for Income Taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Current:
Federal	$ (2,000)	$ (3,000)
State	5,000	4,000
Foreign	465,000	97,000
Total current	468,000	98,000
Deferred:
Federal
State
Foreign
Total deferred
	$ 468,000	$ 98,000