Note 20 - Concentration of Risk - Company's Concentration of Customers and Suppliers (Details)		3 Months Ended				9 Months Ended			12 Months Ended
		Sep. 30, 2020		Sep. 30, 2019		Sep. 30, 2020		Sep. 30, 2019	Dec. 31, 2019
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Customer C [Member]
Concentration risk	[1]	21.00%				16.00%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Customer F [Member]
Concentration risk			[1]	10.00%	[2]		[1]
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Customer A [Member]
Concentration risk								11.00%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Customer B [Member]
Concentration risk	[1]
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Customer D [Member]
Concentration risk	[2]
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Customer E [Member]
Concentration risk	[2]
Cost Of Sales Total [Member] | Supplier Concentration Risk [Member] | Supplier A [Member]
Concentration risk		78.00%		88.00%		78.00%		90.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer C [Member]
Concentration risk									12.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer F [Member]
Concentration risk										[2]
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer A [Member]
Concentration risk						33.00%			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 D [Member]
Concentration risk						27.00%				[2]
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer E [Member]
Concentration risk						15.00%				[2]

[1] Less than 10%.

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