Note 14 - Share-based Compensation - Share-based Compensation Expense (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
Share-based compensation expense	[1]	$ 1,156	$ 958
Basic earnings per share (in dollars per share)	[1]	$ 0.07	$ 0.06
Diluted earnings per share (in dollars per share)	[1]	$ 0.07	$ 0.06
Cost of Sales [Member]
Share-based compensation expense	[1]	$ 106	$ 99
Selling, General and Administrative Expenses [Member]
Share-based compensation expense	[1]	$ 1,050	$ 859

[1] Income tax benefit is not illustrated because the Company is currently in a full tax valuation allowance position and an actual income tax benefit was not realized for the years ended December 31, 2020 and 2019. The result of the income (loss) situation creates a timing difference, resulting in a deferred tax asset, which is fully reserved for in the Company's valuation allowance.