Number of active stock based compensation plans.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Duration of Performance Period

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Number of Shares

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No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Offering Period

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- Definition

Stock plans.

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No definition available.

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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

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-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

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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

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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

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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).

+ 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

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- Definition

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

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No definition available.

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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

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- Definition

Percentage of vesting of share-based compensation awards.

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- Definition

Purchase price of common stock expressed as a percentage of its fair value.

+ References

No definition available.

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Stock Plans (Details Textual) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016 USD ($) share_based_compensation_plan $ / shares shares	Sep. 30, 2015 USD ($) $ / shares shares	Sep. 30, 2016 USD ($) share_based_compensation_plan shares $ / shares	Sep. 30, 2015 USD ($) $ / shares shares
Stock Plans (Textual) [Abstract]
Stock-based compensation plans (in shares) \| share_based_compensation_plan	2		2
Stock options granted during the period (in shares) \| shares	0	58,641	0	321,844
Average grant date fair value per share (in shares) \| $ / shares		$ 2.44		$ 2.32
Stock-based compensation expense	$ 1,097	$ 1,055	$ 3,759	$ 2,906
Stock options
Stock Plans (Textual) [Abstract]
Stock-based compensation expense	49	75	134	156
Restricted stock awards
Stock Plans (Textual) [Abstract]
Stock-based compensation expense	200	500	$ 200	1,500
Director restricted stock unit awards
Stock Plans (Textual) [Abstract]
Restricted stock unit vesting period (in years)			1 year
Restricted stock unit awards
Stock Plans (Textual) [Abstract]
Stock-based compensation expense	824	374	$ 2,305	$ 1,049
Restricted stock unit vesting period (in years)			4 years
Number of unrestricted shares of common stock to be received upon vesting \| shares			1
Restricted stock units, granted (in shares) \| shares			1,236,747	808,285
Restricted stock unit awards \| Service-based
Stock Plans (Textual) [Abstract]
Stock-based compensation expense	$ 544	$ 400	$ 1,613	$ 975
Restricted stock units, granted (in shares) \| shares	49,116	40,190	904,028	593,454
Weighted average grant date fair value (in dollars per share) \| $ / shares	$ 5.09	$ 4.72	$ 5.56	$ 6.98
Performance restricted stock unit awards
Stock Plans (Textual) [Abstract]
Restricted stock units, granted (in shares) \| shares			332,719	214,831
Weighted average grant date fair value (in dollars per share) \| $ / shares			$ 7.50	$ 7.19
Performance restricted stock unit awards \| Market-condition
Stock Plans (Textual) [Abstract]
Stock-based compensation expense	$ 250	$ 34	$ 621	$ 102
Restricted stock units, granted (in shares) \| shares	0		286,495
Performance restricted stock unit awards \| Performance Period 1
Stock Plans (Textual) [Abstract]
Performance periods			1 year
Performance restricted stock unit awards \| Performance Period 2
Stock Plans (Textual) [Abstract]
Performance periods			2 years
Performance restricted stock unit awards \| Performance Period 3
Stock Plans (Textual) [Abstract]
Performance periods			3 years
Employee stock purchase plan
Stock Plans (Textual) [Abstract]
Stock-based compensation expense	$ 53	$ 60	$ 189	$ 200
Weighted average grant date fair value (in dollars per share) \| $ / shares	$ 1.59	$ 1.54	$ 2.04	$ 1.74
Discount rate from market value on offering date			85.00%
Offering period			6 months
Bonus stock award
Stock Plans (Textual) [Abstract]
Stock-based compensation expense	$ (31)		$ 900
Maximum \| Performance restricted stock unit awards \| Market-condition
Stock Plans (Textual) [Abstract]
Potential vesting percentages			200.00%
Minimum \| Performance restricted stock unit awards \| Market-condition
Stock Plans (Textual) [Abstract]
Potential vesting percentages			0.00%