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Inventories (Details) (USD $) In Thousands, unless otherwise specified	Apr. 03, 2015	Jan. 02, 2015
Public Utilities, Inventory [Line Items]
Raw materials and purchased parts	$ 2,078us-gaap_InventoryRawMaterials	$ 2,146us-gaap_InventoryRawMaterials
Work-in-process	1,881us-gaap_InventoryWorkInProcess	1,781us-gaap_InventoryWorkInProcess
Finished goods	14,115us-gaap_InventoryFinishedGoods	14,504us-gaap_InventoryFinishedGoods
Inventory, Gross	18,074us-gaap_InventoryGross	18,431us-gaap_InventoryGross
Less: inventory reserves	2,801us-gaap_InventoryValuationReserves	2,714us-gaap_InventoryValuationReserves
Inventory, Net	$ 15,273us-gaap_InventoryNet	$ 15,717us-gaap_InventoryNet

X

- Definition

Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 6

-Subparagraph a

-Article 5



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

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-Subparagraph (SX 210.5-02.6(a)(1))

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X

- Definition

Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.6(a))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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X

- Definition

Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.6(a))

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-Name Accounting Standards Codification

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X

- Definition

Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 6

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-Article 5



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

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Amount of valuation reserve for inventory.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

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-Name Regulation S-X (SX)

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-Publisher FASB

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- Definition

Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

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