Income taxes (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 01, 2014	Mar. 02, 2013	Feb. 25, 2012
Income (loss) before income taxes:
U.S.	$ 4,100	$ 12,374	$ (15,484)
Foreign	4,513	(16,953)	(16,561)
Income (loss) before taxes	8,613	(4,579)	(32,045)
Current
Federal	3,746	1,630	89
State	654	644	672
Foreign	1,838	1,183	1,261
Total current provision	6,238	3,457	2,022
Deferred
Federal	(3,676)	459	499
State	(2,373)	215	251
Foreign	258	(8,580)	(4,146)
Total deferred benefit	(5,791)	(7,906)	(3,396)
Total provision (benefit) for income taxes	447	(4,449)	(1,374)
Differences between the actual (benefit) provision for income taxes and the amounts computed by applying the statutory federal tax rate to income before taxes
Provision (benefit) computed at federal statutory rate	3,014	(1,603)	(11,216)
Impairment of nondeductible goodwill			12,730
Permanent differences	292	1,387	40
Change in valuation allowance	(1,992)	(1,689)	(3,493)
State income taxes, net of federal benefit	68	973	(1,069)
Residual effect of intraperiod tax allocation			115
Effect of foreign income taxes	(547)	1,181	1,437
Change in Swedish tax rate		(2,936)
Economic zone credits	(200)	(1,686)
Other, net	(188)	(76)	82
Total provision (benefit) for income taxes	447	(4,449)	(1,374)
Deferred tax assets:
Inventory	2,084	2,154
Loss and credit carryforwards	5,692	5,013
Pension liability adjustment	344	274
Accrued liabilities	4,650	1,462
Subtotal	12,770	8,903
Valuation allowance	(4,297)	(5,564)
Total deferred tax assets	8,473	3,339
Deferred tax liabilities:
Intangibles	(85,935)	(85,848)
Financial instruments		(434)
Capital assets	(2,719)	(3,322)
Total deferred tax liabilities	(88,654)	(89,604)
Net deferred tax liabilities	(80,181)	(86,265)
U.S.
Income taxes
Term for which position of cumulative profits is maintained	3 years
Valuation allowance	$ 2,753