Note 2 - Business Combination - Contingent Consideration Liability (Details) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended		19 Months Ended
	Jul. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021
Balance			$ 721
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability			(739)	$ 660
Less payments			(1,052)	(500)
Balance		$ 721	709	721	$ 709
Emerald Medical Services Pte. Ltd [Member]
Balance			3,574	0
Addition for acquisition of Emerald Medical Services				3,414
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability			(739)	660
Less payments	$ (1,000)	(500)	(1,052)	(500)	(1,552)
Balance		$ 3,574	$ 1,783	$ 3,574	$ 1,783