Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2015

Valuation and Qualifying Accounts [Abstract]

Valuation and Qualifying Accounts

Valuation and Qualifying Accounts

(US $ in thousands)

			Charges
			(Credit)			Charges
			to			to
	Beginning		Costs and			Other					End of
	of year		Expenses			Accounts		Deductions			Year
Allowance for doubtful accounts(1):
Year ended December 31, 2013	$	31	$	30		$	-	$	(4	)	$	57
Year ended December 31, 2014		57		74			-		(15	)		116
Year ended December 31, 2015		116		(65	)		-		(1	)		50
Allowance for net deferred tax assets:
Year ended December 31, 2013	$	20,781	$	-		$	-	$	63		$	20,844
Year ended December 31, 2014		20,844		-			-		(1,569	)		19,275
Year ended December 31, 2015		19,275		-			-		2,868			22,143

(1) Write-off, net of recoveries for the allowance for doubtful accounts.