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Shareholders' Equity (Details) - USD ($) |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
May. 09, 2013 | Jan. 02, 2016 | Jan. 03, 2015 | Dec. 28, 2013 | Jan. 02, 2016 | Jan. 03, 2015
Shareholders' Equity |  |  |  |  |  |
Document Fiscal Year Focus |  | 2015 |  |  |  |
Issuance of Common Stock |  | $ 24,000 | $ 24,000 |  |  |
Granted (in shares) |  | 100,000 |  |  |  |
Assumptions used to estimate the fair value of stock options granted |  |  |  |  |  |
Expected dividend yield (as a percent) |  | 0.00% |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |  |  |  |  |  |
Granted (in shares) |  | 100,000 |  |  |  |
Outstanding Options, Weighted Average Remaining Contractual Life (in years) |  | 5 years 2 months 22 days | 4 years 6 months 21 days |  |  |
Options exercisable at January 2, 2016 |  |  |  |  | $ 0 | $ 212
Common Stock [Member] |  |  |  |  |  |
Shareholders' Equity |  |  |  |  |  |
Issuance of Common Stock (in Shares) |  | 13,000 | 0 |  |  |
Issuance of Common Stock |  | $ 24,000 | $ 24,000 |  |  |
Stock Issued During Period, Shares, Period Increase (Decrease) |  |  | 217,000 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |  |  |  |  |  |
Exercised |  | (13,000) |  |  |  |
2011 Plan |  |  |  |  |  |
Shareholders' Equity |  |  |  |  |  |
Maximum number of shares of common stock which can be issued |  |  |  |  | 700,000 |
Stock options |  |  |  |  |  |
Shareholders' Equity |  |  |  |  |  |
Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price |  | $ 2.67 |  | $ 2.73 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value |  |  |  |  | $ 0 |
Options Outstanding |  | 905,000 | 766,000 | 766,000 | 780,000 | 905,000
Granted (in shares) |  | 130,000 | 219,000 |  |  |
Granted, exercise price |  | $ 1.33 | $ 3.04 |  |  |
Weighted average grant date fair value (in dollars per share) |  | $ 1.12 | $ 2.34 |  |  |
Assumptions used to estimate the fair value of stock options granted |  |  |  |  |  |
Expected dividend yield (as a percent) |  | 0.00% | 0.00% |  |  |
Expected stock price volatility (as a percent) |  | 84.80% | 83.82% |  |  |
Risk-free interest rate (as a percent) |  | 2.16% | 2.16% |  |  |
Expected life of options (in years) |  | 10 years | 7 years 6 months 18 days |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |  |  |  |  |  |
Options Outstanding Balance |  | 905,000 | 766,000 |  |  |
Granted (in shares) |  | 130,000 | 219,000 |  |  |
Exercised |  | (12,000) | (10,000) |  |  |
Cancelled/expired |  | (173,000) |  |  |  |
Options Outstanding Balance |  | 780,000 | 905,000 | 766,000 |  |
Options exercisable at January 2, 2016 |  |  |  |  | 632 |
Weighted average exercise Price, balance |  | $ 3.25 | $ 3.26 |  |  |
Granted, exercise price |  | 1.33 | 3.04 |  |  |
Exercisesd, exercise Price |  | 1.89 | 2.38 |  |  |
Expired, exercise price |  | 4.63 |  |  |  |
Weighted Average Exercise Price, balance |  | $ 2.70 | $ 3.25 | $ 3.26 |  |
Options exercisable at January 2, 2016 |  |  |  |  | $ 2.79 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period |  | 70,000 |  | 70,000 |  |
Stock options | Common Stock [Member] |  |  |  |  |  |
Shareholders' Equity |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value |  |  |  |  | $ 10,000 | $ 9,000
Stock options | 2011 Plan |  |  |  |  |  |
Shareholders' Equity |  |  |  |  |  |
Options Outstanding |  | 534,000 |  |  | 534,000 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |  |  |  |  |  |
Options Outstanding Balance |  | 534,000 |  |  |  |
Stock options | 2011 Plan | Employees |  |  |  |  |  |
Shareholders' Equity |  |  |  |  |  |
Vesting period | 2 years |  |  |  |  |
Stock options | 2011 Plan | Non-employee directors |  |  |  |  |  |
Shareholders' Equity |  |  |  |  |  |
Vesting period | 6 months |  |  |  |  |
Stock options | 2006 Plan |  |  |  |  |  |
Shareholders' Equity |  |  |  |  |  |
Options Outstanding |  | 238,000 |  |  | 238,000 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |  |  |  |  |  |
Options Outstanding Balance |  | 238,000 |  |  |  |
Stock options | 1997 Plan |  |  |  |  |  |
Shareholders' Equity |  |  |  |  |  |
Options Outstanding |  | 8,000 |  |  | 8,000 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |  |  |  |  |  |
Options Outstanding Balance |  | 8,000 |  |  |  |

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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 The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + 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)(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own 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 (f)(2)(iv) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + 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 (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option 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)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option 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)(1)(iii) -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 Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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