Note 20 - Concentration of Risk - Company's Concentration of Customers and Suppliers (Details)		3 Months Ended				6 Months Ended				12 Months Ended
		Jun. 30, 2020		Jun. 30, 2019		Jun. 30, 2020		Jun. 30, 2019		Dec. 31, 2019
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Customer A [Member]
Concentration risk			[1]	11.00%			[1]	13.00%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Customer B [Member]
Concentration risk	[1]
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Customer C [Member]
Concentration risk			[1]		[2]		[1]		[2]
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Customer D [Member]
Concentration risk			[1]		[2]		[1]		[2]
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Customer E [Member]
Concentration risk			[1]		[2]		[1]		[2]
Cost Of Sales Total [Member] | Supplier Concentration Risk [Member] | Supplier A [Member]
Concentration risk		81.00%		91.00%		78.00%		90.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer A [Member]
Concentration risk						27.00%				57.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer B [Member]
Concentration risk							[1]			13.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer C [Member]
Concentration risk						17.00%				12.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer D [Member]
Concentration risk						19.00%					[2]
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer E [Member]
Concentration risk						16.00%					[2]

[1] Less than 10%.

[2] No transaction incurred for the reporting period/no balance existed as of the reporting date.