Shareholders' equity (Tables)

12 Months Ended

Dec. 31, 2022

Stockholders' Equity Note [Abstract]

Components of Changes in Accumulated Other Comprehensive Income (Loss)

The components of and changes in accumulated other comprehensive income (loss) are as follows:

(U.S. Dollars, in thousands)	Currency Translation Adjustments			Neo Medical Convertible Loans			Other Investments		Accumulated Other Comprehensive Income (Loss)
Balance at December 31, 2019	$	(3,039	)	$	—		$	—	$	(3,039	)
Other comprehensive income		4,872			1,881			—		6,753
Income taxes		—			(462	)		—		(462	)
Balance at December 31, 2020	$	1,833		$	1,419		$	—	$	3,252
Other comprehensive loss		(2,544	)		(942	)		—		(3,486	)
Income taxes		—			234			—		234
Balance at December 31, 2021	$	(711	)	$	711		$	—	$	—
Other comprehensive income (loss)		(1,771	)		294			101		(1,376	)
Income taxes		—			—			—		—
Balance at December 31, 2022	$	(2,482	)	$	1,005		$	101	$	(1,376	)