Accrued Expenses and Other Current Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Apr. 03, 2015	Dec. 31, 2014	Mar. 28, 2014	Dec. 31, 2013
Other Liabilities Disclosure [Abstract]
Accrued compensation and benefits	$ 8,269	$ 7,741
Accrued warranty	2,825	3,044	3,310	3,315
Accrued professional services	2,201us-gaap_AccruedProfessionalFeesCurrent	1,827us-gaap_AccruedProfessionalFeesCurrent
Other	8,229us-gaap_OtherLiabilitiesCurrent	6,789us-gaap_OtherLiabilitiesCurrent
Total	$ 21,524	$ 19,401

Carrying value as of the balance sheet date of obligations incurred through that date and payable for professional fees, such as for legal and accounting services received. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Aggregate carrying amount of current liabilities (due within one year or within the normal operating cycle if longer) not separately disclosed in the balance sheet. Includes costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered and of liabilities not separately disclosed.

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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers. For classified balance sheets, represents the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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