Income taxes (Tables)

12 Months Ended

Dec. 26, 2014

Income Tax Disclosure [Abstract]

Schedule of loss before income tax, domestic and foreign

Loss before income taxes was as follows (in thousands):

	Years Ended
	December 26, 2014			December 27, 2013
Domestic	$	(10,935	)	$	(14,832	)
Non-U.S.	(17,171		)	(7,808		)
Total	$	(28,106	)	$	(22,640	)

Components of income tax expense

Income tax expense was as follows (in thousands):

	Years Ended
	December 26, 2014			December 27, 2013
Current:
Federal	$	554		$	462
State and local	65			55
Non-U.S.	4,986			2,952
	5,605			3,469
Deferred:
Federal	(101		)	140
State and local	—			(55		)
Non-U.S.	(752		)	829
	(853		)	914
Net tax expense	$	4,752		$	4,383

Effective tax rate reconciliation

A reconciliation of the U.S statutory federal income tax rate with our effective income tax rate was as follows:

	Years Ended
	December 26, 2014		December 27, 2013
U.S. statutory federal income tax rate	35	%	35	%
Decrease (increase) resulting from:
Non-deductible expenses and other	(8	)%	(21	)%
Withholding taxes	(5	)%	(5	)%
Tax credits	6	%	5	%
Tax effect of valuation allowance	(11	)%	(8	)%
Foreign rate differential	(34	)%	(25	)%
Effective tax rate	(17	)%	(19	)%

Unrecognized tax benefits reconciliation

A reconciliation of the liability for uncertain tax positions was as follows (in thousands):

	December 26, 2014			December 27, 2013
Unrecognized tax benefits at the beginning of the year	$	3,522		$	7,880
Additions to tax positions related to current year	628			1,202
Additions to tax positions related to prior years	28			—
Reductions to tax positions related to prior years	(24		)	(1,058		)
Settlements with tax authorities	(91		)	—
Lapses in statutes of limitation	(1,677		)	(4,502		)
Unrecognized tax benefits at the end of the year	$	2,386		$	3,522

Components of deferred tax assets and liabilities

Deferred tax assets and liabilities included the following (in thousands):

	December 26, 2014			December 27, 2013
Assets:
Inventories	$	1,231		$	936
Plant and equipment	4,913			5,145
Vacation pay and other compensation	1,082			234
Pension expense	1,934			1,100
Stock awards	1,523			1,194
Accrued liabilities	2,065			1,896
Net operating losses – federal, state and foreign	21,816			19,739
Tax credits	8,736			7,368
Acquired intangibles	2,119			2,851
Other	4,142			5,844
Total deferred tax assets	49,561			46,307
Valuation allowance	(41,277		)	(38,191		)
Net deferred tax assets	8,284			8,116
Liabilities:
Foreign earnings not permanently invested	8,883			9,243
Restructuring	1,551			1,551
Acquired intangibles	639			583
Other	3,272			3,653
Total deferred tax liabilities	14,345			15,030
Net deferred tax liabilities	$	(6,061	)	$	(6,914	)
Deferred taxes are classified in the Consolidated Balance Sheets as follows:
Current tax assets (included in prepaid expenses and other current assets)	$	2,140		$	1,305
Current tax liabilities (included in accrued expenses and other liabilities)	(21		)	(990		)
Non-current tax assets	2,071			4,557
Non-current tax liabilities	(10,251		)	(11,786		)
Net deferred tax liabilities	$	(6,061	)	$	(6,914	)