Share-Based Compensation Arrangement By Share Based Payment Award, Award Exercise Period

No definition available.

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- Definition

Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Awards, Pre-Tax Contibution Percentage Of Compensation

+ References

No definition available.

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- Definition

Share-Based Compensation Arrangement By Share-Based Payment Award, Non-Option Equity Instrument, Discount Percentage Attributable to Compensation Expense

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No definition available.

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- Definition

Share-Based Compensation Arrangement By Share-Based Payment Award, Non-Option Equity Instrument, Percentage Of Share Price

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No definition available.

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- Definition

Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Reduction Of Number of Shares Reserved For Issuance

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No definition available.

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- Definition

Stock based compensation.

+ References

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.

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Aggregate number of common shares reserved for future issuance.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation.

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- Definition

Unrecognized cost of unvested share-based compensation awards.

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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.

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Represents the quantification of the effect of adopting the new accounting standard or change in accounting principle expected by the entity to have a significant effect on the entity's financial statements.

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- Definition

Amount of cash inflow from issuance of shares under share-based compensation arrangement, excluding stock option exercises.

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- Definition

Amount of cash inflow from exercise of stock options granted under share-based compensation arrangement.

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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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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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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 estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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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.

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No definition available.

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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

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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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.

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- Definition

Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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- Definition

Number of share instruments newly issued under a share-based compensation plan.

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Amount of capitalized and expensed compensation cost from equity-based compensation arrangements.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Sep. 30, 2016	Mar. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
ASC 2016-09 Impact: Amount of deferred tax assets that had not been previously recognized due to the recognition of excess tax benefits	$ 696	$ 1,231
Stock-Based Compensation (Textual) [Abstract]
Stock options, Outstanding, Aggregate Intrinsic Value	1,268	681	$ 123
Stock options, Exercisable, Aggregate Intrinsic Value	$ 9	$ 382	$ 122
Stock options, Exercisable, Number of Options (in shares)	307	379	687
Stock options, Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 12.37	$ 11.39	$ 11.60
Stock options, Exercisable, Weighted Average Remaining Contractual Life	1 year 4 months 13 days	1 year 6 months	2 years
Stock options, Outstanding, Weighted Average Remaining Contractual Life	3 years 3 months 7 days	2 years 2 months 23 days	2 years 14 days
Allocated Share-based Compensation Expense	$ 3,518	$ 3,651	$ 3,734
Stock options
Stock-Based Compensation (Textual) [Abstract]
Stock award, vesting period	4 years
Stock award, exercise period	5 years
Awards other than options, decrease in number of shares reserved for issuance	0
Common stock, shares reserved for issuance	12,415
Number of shares available for future grants	1,715
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate	0.00%	0.00%	0.00%
Weighted-average fair value per share, options granted (in dollars per share)	$ 2.74	$ 2.77	$ 4.39
Stock options, total intrinsic value of options exercised	$ 149	$ 484	$ 50
Unrecognized compensation expense	$ 1,789
Weighted-average period of recognition (in years)	2 years 11 months 26 days
Allocated Share-based Compensation Expense	$ 707	702	1,229
Cash received under stock option plans for exercises	1,236	2,438	90
Restricted stock
Stock-Based Compensation (Textual) [Abstract]
Unrecognized compensation expense	$ 3,863
Weighted-average period of recognition (in years)	2 years 1 month 24 days
Allocated Share-based Compensation Expense	$ 2,760	$ 2,938	$ 2,422
Granted (in shares)	271	424	203
Restricted stock, Granted, Weighted-average grant date fair value (in dollars per share)	$ 8.83	$ 8.68	$ 12.43
Employee stock purchase plan
Stock-Based Compensation (Textual) [Abstract]
Number of shares available for future grants	954
Allocated Share-based Compensation Expense	$ 50	$ 11	$ 58
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period	46	18	28
Employee stock purchase plan, discount percentage attributable to compensation expense	15.00%
Cash received under the employee stock purchase plan	$ 358	$ 146	$ 291
Employee stock purchase plan \| Maximum
Stock-Based Compensation (Textual) [Abstract]
Employee election percentage of pre-tax compensation withheld to purchase Company's common stock shares	6.00%
ESPP Plan [Member] \| Employee stock purchase plan
Stock-Based Compensation (Textual) [Abstract]
Employee stock purchase plan, number of shares authorized				1,650
Percentage of Company's common stock share price					85.00%
Accounting Standards Update 2016-09 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
ASC 2016-09 Impact: Amount of deferred tax assets that had not been previously recognized due to the recognition of excess tax benefits	$ 1,571
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	1,571
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost	215
Accounting Standards Update 2016-09 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost	3,449
Operating Expense [Member] \| Accounting Standards Update 2016-09 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ 19