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Share-Based Compensation - Narrative (Details) | 6 Months Ended | 12 Months Ended
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Jul. 02, 2016 shares | Dec. 31, 2016 USD ($) plan tranche shares | Jan. 02, 2016 USD ($) shares | Jan. 03, 2015 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of stock compensation plans | plan |  | 3 |  |
Stock-based compensation expense | $ |  | $ 2,339,000 | $ 1,827,000 | $ 3,840,000
Income tax benefits offset by a valuation allowance | $ |  | 900,000 | 700,000 | 1,500,000
Excess tax benefits from share-based compensation arrangements | $ |  | $ 0 | $ 0 | $ 0
Forfeiture rate |  | 0.00% | 13.00% | 13.00%
Long-term equity incentive plan 2004 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares reserved for issuance |  | 0 |  |
Long term equity incentive plan 2006 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares reserved for issuance |  | 0 |  |
Long-term equity incentive plan 2016 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares reserved for issuance |  | 263,500 |  |
Restricted Stock |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total unrecognized compensation expense | $ |  | $ 300,000 |  |
Weighted average term for compensation expense to be recognized |  | 6 months |  |
Weighted average remaining contractual term |  | 6 months |  |
Share-based compensation, shares excluded from weighted average remaining contractual terms (in shares) |  | 0 |  |
Total fair value of vested stocks | $ |  | $ 1,100,000 | $ 1,500,000 | $ 2,400,000
Share-based compensation arrangement, shares outstanding (in shares) |  | 98,560 | 170,335 |
Shares vested during the period |  | 69,825 |  |
Stock-based compensation expense | $ |  | $ 983,000 | $ 1,606,000 | $ 1,941,000
Restricted Stock | Maximum |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Awards vesting period |  | 3 years |  |
Weighted average remaining contractual term |  | 3 years |  |
Restricted Stock Units (RSUs) |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total unrecognized compensation expense | $ |  | $ 1,000,000 |  |
Weighted average term for compensation expense to be recognized |  | 1 year 7 days |  |
Weighted average remaining contractual term |  | 1 year 7 days |  |
Share-based compensation, shares excluded from weighted average remaining contractual terms (in shares) |  | 200,732 |  |
Total fair value of vested stocks | $ |  | $ 600,000 |  |
Share-based compensation arrangement, shares outstanding (in shares) |  | 270,450 | 140,179 |
Shares vested during the period |  | 65,711 | 0 | 0
Restricted Stock Units (RSUs) | Executive Officer |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Awards vesting period |  | 2 years |  |
Restricted Stock Units (RSUs) | Director |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Awards vesting period |  | 1 year |  |
Restricted Stock Units (RSUs) | Maximum |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Awards vesting period |  | 3 years |  |
Weighted average remaining contractual term |  | 3 years |  |
Restricted Stock Units (RSUs) | Maximum | Director |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based compensation, remaining contractual terms |  | 10 years |  |
Performance Shares (2) |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total unrecognized compensation expense | $ |  | $ 600,000 |  |
Share-based compensation, remaining contractual terms |  | 1 year 7 months 6 days |  |
Share-based compensation, shares excluded from weighted average remaining contractual terms (in shares) |  | 0 |  |
Total fair value of vested stocks | $ |  | $ 1,600,000 | $ 1,600,000 | $ 1,700,000
Share-based compensation arrangement, shares outstanding (in shares) |  | 67,000 | 126,306 |
Number of vesting tranches | tranche |  | 3 |  |
Shares vested during the period |  | 54,556 |  |
Stock-based compensation expense | $ |  | $ 92,000 | $ 127,000 | $ 1,725,000
Allocated share-based compensation | $ |  | $ 0 |  |
Award requisite service period |  | 3 years |  |
Performance Shares (2) | Employees and Directors No Longer Employed During Current Year |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based compensation arrangement, shares outstanding (in shares) |  | 0 | 46,941 |
Shares vested during the period | 46,941 |  |  |
Stock-based compensation expense | $ |  | $ 200,000 |  |
Performance Shares (2) | Employees and Directors No Longer Employed During Prior Year |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock-based compensation expense | $ |  |  | $ 1,200,000 |
Stock options |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Granted (in shares) |  | 0 | 0 | 0
Stock options exercised in the period |  | 0 | 0 | 0
Compensation expense for options | $ |  | $ 0 | $ 0 | $ 0
Stock options | Maximum |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Weighted average remaining contractual term |  | 10 years |  |
Stock Appreciation Rights (SARs) |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Granted (in shares) |  | 493,000 |  |
Stock-based compensation expense | $ |  | $ 375,000 | $ 0 | $ 0
Allocated share-based compensation | $ |  | $ 400,000 |  |
Vesting immediately | Restricted Stock Units (RSUs) | Director |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based compensation, shares excluded from weighted average remaining contractual terms (in shares) |  | 8,186 |  |

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, 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 S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(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 The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during 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 (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, 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 (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, 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 (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + 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 number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + 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 Weighted average remaining contractual term for equity-based awards excluding options, 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 (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting 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 (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash. + 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 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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