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Stock Based Compensation (Details Textual) (USD $) | 3 Months Ended | 9 Months Ended |  |  |  | 0 Months Ended | 9 Months Ended |  | 9 Months Ended
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Sep. 27, 2014 | Sep. 28, 2013 | Sep. 27, 2014 | Sep. 28, 2013 | Jul. 31, 2014 | Feb. 28, 2013 | Feb. 28, 2012 | Jan. 04, 2014 Restricted Stock Units (RSUs) | Sep. 27, 2014 Restricted Stock Units (RSUs) | Sep. 27, 2014 Restricted Stock Units (RSUs) Maximum | Sep. 27, 2014 Restricted Stock Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Weighted-average grant date fair value of the options granted | $ 3.54 | $ 3.19 | $ 4.06 | $ 3.12 |  |  |  |  |  |  |
Dividend yield | 0.00% | 0.00% | 0.00% | 0.00% |  |  |  |  |  |  |
Stock-based compensation capitalized into inventory | $ 23,000 | $ 17,000 |  |  |  |  |  |  |  |  |
Total intrinsic value of options exercised |  |  | 354,000 | 231,000 |  |  |  |  |  |  |
Total unrecognized compensation cost, net of expected forfeitures, related to non-vested share-based compensation arrangements under the Incentive Plan | 1,500,000 |  | 1,500,000 |  |  |  |  |  |  |  |
Compensation cost recognition, weighted average period (years) |  |  | 2 years 7 months 6 days |  |  |  |  |  |  |  |
Period consider for calculation of average stock price performance prior awards vesting |  |  |  |  |  |  |  |  | 2 months |  |
Period consider for calculation of average stock price performance after awards vesting |  |  |  |  |  |  |  |  | 2 months |  |
Restricted stock units granted |  |  |  |  |  |  |  | 50,000 | 59,780 |  | 2,445
Restricted stock units, calculated stock price |  |  |  |  |  |  |  |  |  | $ 11.00 |
Weighted grant date fair value of restricted stock units granted |  |  |  |  |  |  |  |  | 314,000 |  | 20,000
Weighted-average grant date fair value of restricted stock units granted |  |  |  |  |  |  |  |  | $ 5.25 |  | $ 8.18
Stock repurchase program authorized amount |  |  |  |  | 3,000,000 | 3,000,000 | 4,000,000 |  |  |  |
Stock repurchase, shares |  |  | 406,245 |  |  |  |  |  |  |  |
Shares repurchased price, per share |  |  | $ 8.40 |  |  |  |  |  |  |  |
Common shares under the stock repurchase program | $ 2,200,000 |  | $ 2,200,000 |  |  |  |  |  |  |  |

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- Definition Period consider for calculation of average stock price performance prior awards vesting. + References No definition available. + Details
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- Definition Share based compensation arrangement by share based payment award equity instruments other than options non vested grant date fair value. + References No definition available. + Details
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- Definition Represents the compensation cost capitalized during the period arising from equity-based compensation arrangements (for example, shares of stock, units, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Unrecognized cost of unvested share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction. + References No definition available. + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
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- Definition Total cost of shares repurchased divided by the total number of shares repurchased. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
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