Note 14 - Investment in Equity-accounted Investees - Equity-accounted Investees (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020	Feb. 25, 2021
Carrying amount of investment in equity-accounted investees	$ 25,006		$ 25,006		$ 111
Aggregate amounts of the group’s share of loss of equity-accounted investees	(46)	$ (5)	(1)	$ (25)
Current assets	207,972		207,972		198,440
Non-current assets	411,856		411,856		406,213
Current and non-current liabilities	(371,760)		(371,760)		(357,771)
Net assets	40,759		40,759		0
Opening net assets			0
Share of profit of equity-accounted investees	3,122	1,752	1,387	(29,417)
Other Comprehensive Income (Loss), Net of Tax, Total	(848)	1,813	(3,229)	(5,162)
Net Assets, Ending Balance	40,759		40,759		0
Revenue	172,948	163,097	525,879	466,926
Operating income/ (loss)	8,339	8,015	29,232	(12,569)
Total comprehensive income for the period	2,274	3,565	(1,842)	(34,579)
Loss of equity-accounted investee	(46)	(5)	(1)	(25)
Equity Method Investment, Aggregate Income (Loss)	(46)	(5)	(1)	(25)
CSS Corp LP [Member]
Aggregate amounts of the group’s share of loss of equity-accounted investees	(46)	0	6	0
Current assets	55		55		0
Non-current assets	40,772		40,772		0
Current and non-current liabilities	(68)		(68)		0
Net assets	40,759		40,759		0
Opening net assets			0	0	0
Acquired during the year			40,750		0
Share of profit of equity-accounted investees			9		0
Other Comprehensive Income (Loss), Net of Tax, Total			0	0	0
Net Assets, Ending Balance	40,759		40,759		0
Revenue	0	0	0	0
Other income	(67)	0	72	0
Expenses	(9)	0	(63)	0
Operating income/ (loss)	(76)	0	9	0
Total comprehensive income for the period	(76)	0	9	0
Equity Method Investment, Aggregate Income (Loss)	(46)	0	6	0
Immaterial Associates [Member]
Carrying amount of investment in equity-accounted investees	0		0		$ 111
Aggregate amounts of the group’s share of loss of equity-accounted investees	0	(5)	(7)	(25)
Other Comprehensive Income (Loss), Net of Tax, Total	0	0	0	0
Loss of equity-accounted investee	0	(5)	(7)	(25)
Equity Method Investment, Aggregate Income (Loss)	$ 0	$ (5)	$ (7)	$ (25)
CSS Corp LP [Member]
% of ownership interest	61.35%		61.35%		0.00%	62.50%
Carrying amount of investment in equity-accounted investees	$ 25,006		$ 25,006		$ 0
CSS Corp LP [Member] | CSS Corp LP [Member]
% of ownership interest					0.00%