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Note 19 - Related Party Transactions (Details Textual) - USD ($) $ in Thousands		12 Months Ended
	Nov. 17, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accounts Receivable, Related Parties		$ 100	$ 200
Accounts Payable, Related Parties		$ 0	8
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)		516,000
Share-based Payment Arrangement, Expense		$ 933	532	$ 486
Share-based Payment Arrangement, Option [Member]
Share-based Payment Arrangement, Expense		$ 700	$ 500	$ 400
Share-based Payment Arrangement, Nonemployee [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)		0	400,000	0
Share-based Payment Arrangement, Expense		$ 240	$ 64	$ 37
Share-based Payment Arrangement, Nonemployee [Member] | Eric Wu [Member]
Share-based Payment Arrangement, Expense		$ 152	$ 15
Partner and Senior Vice President of China Kington [Member] | Share-based Payment Arrangement, Nonemployee [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)	300,000		300,000
Partner and Senior Vice President of China Kington [Member] | Share-based Payment Arrangement, Nonemployee [Member] | Share-based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)	1 year

X

- Definition

Amount for accounts payable to related parties.

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