Share-based compensation (Tables)

9 Months Ended

Sep. 30, 2022

Share-Based Payment Arrangement [Abstract]

Schedule of Components of Share-Based Compensation Expense

Components of share-based compensation expense are as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
(U.S. Dollars, in thousands)	2022		2021		2022		2021
Cost of sales	$	195	$	200	$	611	$	587
Sales and marketing		948		831		2,929		2,505
General and administrative		3,285		2,531		9,461		7,667
Research and development		301		280		520		711
Total	$	4,729	$	3,842	$	13,521	$	11,470

	Three Months Ended September 30,				Nine Months Ended September 30,
(U.S. Dollars, in thousands)	2022		2021		2022		2021
Stock options	$	294	$	382	$	858	$	1,441
Time-based restricted stock awards and units		2,467		1,819		7,047		5,565
Market-based / performance-based restricted stock units		1,626		1,212		4,567		3,162
Stock purchase plan		342		429		1,049		1,302
Total	$	4,729	$	3,842	$	13,521	$	11,470