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Share-based compensation

9 Months Ended

Sep. 30, 2018

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Share-based compensation

10. Share-based compensation

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

		Three Months Ended September 30,								Nine Months Ended September 30,
(U.S. Dollars, in thousands)		2018				2017				2018				2017
Cost of sales		$	151			$	151			$	408			$	437
Sales and marketing			514				394				1,436				1,073
General and administrative			4,194				2,828				11,488				6,935
Research and development			402				259				1,060				679
Total		$	5,261			$	3,632			$	14,392			$	9,124

		Three Months Ended September 30,								Nine Months Ended September 30,
(U.S. Dollars, in thousands)		2018				2017				2018				2017
Stock options		$	579			$	684			$	2,442			$	1,802
Time-based restricted stock awards and units			2,244				1,552				5,480				4,083
Performance-based restricted stock awards and units			734				115				1,493				340
Market-based restricted stock units			1,298				997				3,855				1,935
Stock purchase plan			406				284				1,122				964
Total		$	5,261			$	3,632			$	14,392			$	9,124

During the three months ended September 30, 2018 and 2017, the Company issued 50,928 and 93,486 shares, respectively, of common stock related to stock option exercises and the vesting of restricted stock awards. During the nine months ended September 30, 2018 and 2017, the Company issued 257,883 and 384,761 shares, respectively, of common stock related to stock purchase plan issuances, stock option exercises and the vesting of restricted stock awards.

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- 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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-URI http://asc.fasb.org/topic&trid=2228938

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 50
-URI http://asc.fasb.org/subtopic&trid=2208855

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