Note 14 - Share-based Compensation - Share-based Compensation Expense (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Share-based compensation expense	$ 1,541	$ 1,156
Basic earnings per share (in dollars per share)	$ 0.08	$ 0.07
Diluted earnings per share (in dollars per share)	$ 0.08	$ 0.07
Cost of Sales [Member]
Share-based compensation expense	$ 130	$ 106
Selling, General and Administrative Expenses [Member]
Share-based compensation expense	$ 1,411	$ 1,050

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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