Note 1 - Organization and Significant Accounting Policies - Concentrations Risk by Geographic Locations (Details) - Geographic Concentration Risk [Member] - Revenue Benchmark [Member]	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Revenue by customers’ geographic locations, percentage	100.00%	100.00%
Revenue by customers’ geographic locations, percentage	100.00%	100.00%
UNITED STATES
Revenue by customers’ geographic locations, percentage	69.00%	77.00%
Revenue by customers’ geographic locations, percentage	69.00%	77.00%
CANADA
Revenue by customers’ geographic locations, percentage	16.00%	13.00%
Revenue by customers’ geographic locations, percentage	16.00%	13.00%
EMEA [Member]
Revenue by customers’ geographic locations, percentage	14.00%	8.00%
Revenue by customers’ geographic locations, percentage	14.00%	8.00%
Geographic, Other [Member]
Revenue by customers’ geographic locations, percentage	1.00%	2.00%
Revenue by customers’ geographic locations, percentage	1.00%	2.00%