Share-based compensation

3 Months Ended

Mar. 31, 2017

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

9. Share-based compensation

The following tables present the detail of share-based compensation by line item in the condensed consolidated statements of operations as well as by award type:

	Three Months Ended March 31,
(U.S. Dollars, in thousands)	2017		2016
Cost of sales	$	149	$	117
Sales and marketing		360		276
General and administrative		2,102		1,558
Research and development		205		148
	$	2,816	$	2,099

	Three Months Ended March 31,
(U.S. Dollars, in thousands)	2017		2016
Stock options	$	595	$	475
Time-based restricted stock awards		1,292		1,308
Performance-based restricted stock awards		112		—
Performance-based and market-based restricted stock units		466		—
Stock purchase plan		351		316
	$	2,816	$	2,099

During the three months ended March 31, 2017 and 2016, the Company issued 214,679 and 203,398 shares, respectively, of common stock related to stock purchase plan issuances, stock option exercises and the vesting of restricted stock awards.

- Definition

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

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