Share-based compensation (Tables)

6 Months Ended

Jun. 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 June 30,				Six Months Ended June 30,
(U.S. Dollars, in thousands)	2022		2021		2022		2021
Cost of sales	$	205	$	209	$	416	$	387
Sales and marketing		1,000		957		1,981		1,674
General and administrative		2,958		2,607		6,176		5,136
Research and development		297		134		219		431
Total	$	4,460	$	3,907	$	8,792	$	7,628

	Three Months Ended June 30,				Six Months Ended June 30,
(U.S. Dollars, in thousands)	2022		2021		2022		2021
Stock options	$	205	$	398	$	564	$	1,059
Time-based restricted stock awards and units		2,410		2,019		4,580		3,746
Market-based / performance-based restricted stock units		1,497		1,053		2,941		1,950
Stock purchase plan		348		437		707		873
Total	$	4,460	$	3,907	$	8,792	$	7,628