Number of active stock based compensation plans.

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- Definition

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

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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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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

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

The compensation expense recognized during the period pertaining to the deferred compensation arrangement.

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- Definition

The total fair value of shares issued during the period under a deferred compensation arrangement.

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- Definition

The carrying amount of the liability as of the balance sheet date to an individual under a deferred compensation arrangement. This amount may be the result of periodic accruals made over the period of active employment, or reflect termination benefits resulting contractual terms or a death benefit.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 710
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-Section 30
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- Definition

Number of shares issued pursuant to the terms of a deferred compensation arrangement.

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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.

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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).

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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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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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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.

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No definition available.

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Stock Plans (Details Textual) $ / shares in Units, $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2017 USD ($) share_based_compensation_plan $ / shares shares	Mar. 31, 2017 USD ($) shares	Jun. 30, 2016 USD ($) $ / shares shares	Jun. 30, 2017 USD ($) share_based_compensation_plan shares $ / shares	Jun. 30, 2016 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	45,000		0	45,000	0
Average grant date fair value (in dollars per share) \| $ / shares	$ 2.95			$ 2.95
Stock-based compensation expense	$ 2,254		$ 1,459	$ 3,792	$ 2,662
Bonuses settled in stock
Stock Plans (Textual) [Abstract]
Stock compensation expense	800		300	1,300	900
Bonuses settled in stock \| Director
Stock Plans (Textual) [Abstract]
Stock compensation expense	100			100
Bonuses settled in stock \| Annual Incentive Bonuses, 2016 Performance Period
Stock Plans (Textual) [Abstract]
Bonuses earned under plan		$ 1,200
Additional bonuses earned for the performance period	300			300
Stock options
Stock Plans (Textual) [Abstract]
Stock-based compensation expense	57		4	107	85
Restricted stock awards
Stock Plans (Textual) [Abstract]
Stock-based compensation expense	100		300	$ 200	9
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	$ 1,236		$ 745	$ 2,102	$ 1,481
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	443,704		152,417	1,413,417	1,187,631
Restricted stock unit awards \| Bonuses settled in stock \| Annual Incentive Bonuses, 2016 Performance Period
Stock Plans (Textual) [Abstract]
Number shares of fully vested common stock and restricted stock units \| shares		89,730
Restricted stock unit awards \| Service-based
Stock Plans (Textual) [Abstract]
Stock-based compensation expense	$ 669		$ 536	$ 1,337	$ 1,069
Restricted stock units, granted (in shares) \| shares	254,942		122,085	921,655	854,912
Weighted average grant date fair value (in dollars per share) \| $ / shares	$ 5.73		$ 5.10	$ 5.52	$ 5.59
Performance restricted stock unit awards
Stock Plans (Textual) [Abstract]
Restricted stock units, granted (in shares) \| shares	188,762		30,332	491,762	332,719
Weighted average grant date fair value (in dollars per share) \| $ / shares	$ 6.08		$ 7.08	$ 6.77	$ 7.50
Market condition restricted stock units
Stock Plans (Textual) [Abstract]
Restricted stock units, granted (in shares) \| shares	30,762		30,332	333,762	286,495
Market condition restricted stock units \| Maximum
Stock Plans (Textual) [Abstract]
Potential vesting percentages				200.00%
Market condition restricted stock units \| Minimum
Stock Plans (Textual) [Abstract]
Potential vesting percentages				0.00%
Market condition restricted stock units \| Performance period one
Stock Plans (Textual) [Abstract]
Restricted stock unit vesting period (in years)				1 year
Market condition restricted stock units \| Performance period two
Stock Plans (Textual) [Abstract]
Restricted stock unit vesting period (in years)				2 years
Market condition restricted stock units \| Performance period three
Stock Plans (Textual) [Abstract]
Restricted stock unit vesting period (in years)				3 years
Employee stock purchase plan
Stock Plans (Textual) [Abstract]
Stock-based compensation expense	$ 20		$ 54	$ 53	$ 135
Weighted average grant date fair value (in dollars per share) \| $ / shares	$ 1.19		$ 2.27	$ 1.19	$ 2.27
Discount rate from market value on offering date				85.00%
Offering period				6 months
Fully vested common stock \| Bonuses settled in stock \| Annual Incentive Bonuses, 2016 Performance Period
Stock Plans (Textual) [Abstract]
Number shares of fully vested common stock and restricted stock units \| shares		142,582