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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
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-Subparagraph (SAB Topic 14.F)
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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
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- Definition

Unrecognized cost of unvested options awarded to employees as compensation.

+ References

No definition available.

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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
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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued 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).

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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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.

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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).

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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- Definition

Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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- Definition

Gross number of share options (or share units) granted during the period.

+ References

No definition available.

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- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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Share Based Compensation - Narrative (Details) - USD ($)		3 Months Ended	12 Months Ended
	Apr. 24, 2017	Mar. 31, 2017	Dec. 31, 2016	May 31, 2015	Apr. 24, 2007
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost		$ 400,000
Granted (in shares)		0	0
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of units of restricted stock granted (in shares)		0	33,321
Grant date fair value (in dollars per share)			$ 16.72
Number of restricted stock units vested (in shares)		0
Compensation cost charged against income		$ 50,000	$ 100,000
Employee Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost charged against income		$ 0	$ 0
2003 Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved and available for issuance (in shares)					19,000
2003 Option Plan \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise period		7 years
2003 Option Plan \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise period		10 years
2015 Stock Compensation Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)				430,000
Number of shares available to grant (in shares)		356,236
Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares expired (in shares)	332