Note 12 - Income Taxes - Components of Provision (Benefit) for Income Taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Current:
Federal	$ (3,000)	$ (2,000)
State	4,000	5,000
Foreign	97,000	33,000
Total current	98,000	36,000
Deferred:
Federal
State
Foreign		509,000
Total deferred		509,000
	$ 98,000	$ 545,000