Note 15 - Activity of Business Segments (Details Textual)	12 Months Ended
	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Number of Operating Segments	2
Revenue from Contract with Customer, Including Assessed Tax	$ 102,700,000	$ 46,665,000
AUSTRALIA
Revenue from Contract with Customer, Including Assessed Tax	$ 8,090,000