Share-based compensation (Tables)

6 Months Ended

Jun. 30, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Share-Based Compensation by Line Item in Consolidated Statements of Operations

The following table shows the detail of share-based compensation by line item in the condensed consolidated statements of operations:

	Three Months Ended June 30,					Six Months Ended June 30,
(U.S. Dollars, in thousands)	2014		2013			2014		2013
Cost of sales	$	29	$	(563	)	$	58	$	(276	)
Sales and marketing		429		470			873		906
General and administrative		657		1,530			1,299		2,705
Research and development		71		57			143		102
Total	$	1,186	$	1,494		$	2,373	$	3,437