Note 21 - Selected Quarterly Financial Information (Unaudited) (Details) - Quarterly Information (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	12 Months Ended
Jan. 03, 2015	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Dec. 28, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Jan. 03, 2015	Dec. 28, 2013
Quarterly Information (Unaudited) [Abstract]
Sales	$ 49,310us-gaap_Revenues	$ 46,382us-gaap_Revenues	$ 49,509us-gaap_Revenues	$ 48,569us-gaap_Revenues	$ 45,849us-gaap_Revenues	$ 41,320us-gaap_Revenues	$ 42,379us-gaap_Revenues	$ 41,230us-gaap_Revenues	$ 193,770us-gaap_Revenues	$ 170,778us-gaap_Revenues
Gross Profit	13,320us-gaap_GrossProfit	13,161us-gaap_GrossProfit	12,955us-gaap_GrossProfit	12,257us-gaap_GrossProfit	11,794us-gaap_GrossProfit	10,684us-gaap_GrossProfit	11,262us-gaap_GrossProfit	10,621us-gaap_GrossProfit	51,693us-gaap_GrossProfit	44,361us-gaap_GrossProfit
Operating Income	2,622us-gaap_OperatingIncomeLoss	2,833us-gaap_OperatingIncomeLoss	3,025us-gaap_OperatingIncomeLoss	2,038us-gaap_OperatingIncomeLoss	(2,479)us-gaap_OperatingIncomeLoss	1,806us-gaap_OperatingIncomeLoss	1,714us-gaap_OperatingIncomeLoss	1,514us-gaap_OperatingIncomeLoss	10,518us-gaap_OperatingIncomeLoss	2,555us-gaap_OperatingIncomeLoss
Net Income	$ 1,717	$ 1,877	$ 2,017	$ 1,203	$ (1,582)	$ 1,142	$ 1,470	$ 960	$ 6,814	$ 1,990
Diluted Income Per Share (in Dollars per share)	$ 0.14us-gaap_EarningsPerShareDiluted	$ 0.15us-gaap_EarningsPerShareDiluted	$ 0.15us-gaap_EarningsPerShareDiluted	$ 0.10us-gaap_EarningsPerShareDiluted	$ (0.13)us-gaap_EarningsPerShareDiluted	$ 0.09us-gaap_EarningsPerShareDiluted	$ 0.12us-gaap_EarningsPerShareDiluted	$ 0.08us-gaap_EarningsPerShareDiluted	$ 0.54us-gaap_EarningsPerShareDiluted	$ 0.16us-gaap_EarningsPerShareDiluted

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

+ References

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

-Publisher FASB

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-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.21)

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-Number 210

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Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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Amount of income (loss) from continuing operations attributable to the parent. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

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The net result for the period of deducting operating expenses from operating revenues.

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No definition available.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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