Derivative instruments

3 Months Ended

Mar. 31, 2016

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Derivative instruments

4. Derivative instruments

In the ordinary course of business, the Company is exposed to the impact of changes in interest rates and foreign currency fluctuations. During 2016 and 2015 the Company made use of a foreign cross-currency swap agreement to manage cash flow exposure generated from foreign currency fluctuations.

The tables below disclose the types of derivative instruments the Company owns, the classifications and fair values of these instruments within the balance sheet, and the amount of gain (loss) recognized in other comprehensive income (loss).

(U.S. Dollars, in thousands) As of March 31, 2016	Fairvalue: favorable (unfavorable)		Balance sheet classification
Cross-currency swap	$	2,033	Prepaid expenses and other current assets
Warrants	$	321	Other long-term assets
As of December 31, 2015
Cross-currency swap	$	2,485	Prepaid expenses and other current assets
Warrants	$	321	Other long-term assets

	Three Months Ended March 31,
(U.S. Dollars, in thousands)	2016		2015
Cross-currency swap unrealized gain (loss), net of taxes	$	26	$	669
Warrants unrealized loss, net of taxes	$	—	$	(4	)