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Stock-Based Compensation - Employee Stock Purchase Plan (Details) - shares |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jan. 01, 2017 | Jun. 30, 2016 | Feb. 03, 2018 | Jan. 28, 2017 | Jan. 30, 2016 | Jun. 04, 2013 | Jul. 31, 2002
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Maximum shares of common stock award (in shares) |  |  |  |  |  | 3,500,000 |
Shares remaining under the original authorization (in shares) |  |  | 737,000 |  |  |  |
Employee Stock Purchase Plan |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Payroll deduction of the fair market value |  |  | 85.00% |  |  |  |
Maximum shares of common stock award (in shares) |  |  | 660,000 |  |  |  | 500,000
Number of additional shares authorized (in shares) | 35,000 | 125,000 |  |  |  |  |
Shares of common stock issued (in shares) |  |  | 34,963 | 31,879 | 19,423 |  |
Shares remaining under the original authorization (in shares) |  |  | 106,327 |  |  |  |

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- Definition Aggregate number of common shares reserved for future issuance. + 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 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Number of additional shares authorized for issuance under an established share-based compensation plan. + References No definition available. + 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=96867065&loc=d3e5070-113901 + Details
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- Definition Maximum number of shares that may be issued in accordance with the plan as a proportion of outstanding capital stock. + References No definition available. + Details
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- Definition Number of share instruments newly issued under a share-based compensation 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 -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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