Shareholders' equity (Tables)

12 Months Ended

Dec. 31, 2021

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			eNeura Debt Security			Neo Medical Convertible Loans			Accumulated Other Comprehensive Income (Loss)
Balance at December 31, 2018	$	(2,386	)	$	5,682		$	—		$	3,296
Cumulative effect adjustment from adoption of ASU 2018-02		—			937			—			937
Other comprehensive loss		(653	)		(2,593	)		—			(3,246	)
Income taxes		—			642			—			642
Reclassification adjustment to:
Interest income (expense), net		—			(1,034	)		—			(1,034	)
Other expense, net		—			(5,193	)		—			(5,193	)
Income taxes		—			1,559			—			1,559
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		$	—