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Percentage of FMV common stock options granted.

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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.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Unrecognized cost of unvested share-based compensation awards.

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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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 highest quantity of shares an employee can purchase under the plan per period.

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Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

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Number of additional shares authorized for issuance under an established share-based compensation plan.

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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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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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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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

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

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Number of options outstanding, including both vested and non-vested options.

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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.

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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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Stock-Based Compensation (Details Textual) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended
	May 25, 2016	Apr. 12, 2010	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	May 29, 2010
Stock Based Compensation Details [Line Items]
Common stock, shares outstanding (in shares)			53,226,382		53,148,441
Weighted-average grant-date fair value (in dollars per share)			$ 3.37	$ 3.53
Unrecognized compensation costs			$ 3,900
Employee Stock Option
Stock Based Compensation Details [Line Items]
Number of Options Issued (in shares)			385,395
Number of Options Forfeited (in shares)			30,503
Shares of common stock options outstanding (in shares)			4,454,261		4,105,369
Director Plan And The 2009 Plan
Stock Based Compensation Details [Line Items]
Intrinsic value of options outstanding			$ 14,700
Intrinsic value of options exercisable			14,000
Restricted Stock
Stock Based Compensation Details [Line Items]
Unrecognized compensation costs			1,400
Compensation expense			$ 223	$ 180
Restricted Stock \| Minimum
Stock Based Compensation Details [Line Items]
Vesting period			1 year
Restricted Stock \| Maximum
Stock Based Compensation Details [Line Items]
Vesting period			3 years
Director Stock Option Plan - 1999
Stock Based Compensation Details [Line Items]
Shares approved and authorized (in shares)			1,975,000
Number of Options Issued (in shares)			2,634,798
Number of Options Forfeited (in shares)			807,782
Vesting period			1 year
Maximum term			10 years
Shares of common stock options outstanding (in shares)			650,000
Director Stock Option Plan - 1999 \| Employee Stock Option
Stock Based Compensation Details [Line Items]
Shares available for grant (in shares)			147,984
1999 Stock Incentive Plan
Stock Based Compensation Details [Line Items]
Shares approved and authorized (in shares)			3,200,000
Number of Options Issued (in shares)			2,892,500
Vesting period			4 years
Maximum term			10 years
FMV common stock options granted (as a percent)			100.00%
Service period			1 year
Plan 2009
Stock Based Compensation Details [Line Items]
Shares approved and authorized (in shares)						5,000,000
Shares of common stock options outstanding (in shares)			3,192,366
Additional shares authorized (in shares)		2,000,000
Maximum number of shares to any individual (in shares)			1,000,000
Common stock, shares outstanding (in shares)			1,413,687
Plan 2009 \| Employee Stock Option
Stock Based Compensation Details [Line Items]
Shares available for grant (in shares)			43,382
Plan 2009 \| Restricted Stock
Stock Based Compensation Details [Line Items]
Shares of common stock options outstanding (in shares)			107,959
Plan 2016
Stock Based Compensation Details [Line Items]
Shares approved and authorized (in shares)	2,000,000
Shares of common stock options outstanding (in shares)			20,000
Shares available for grant (in shares)			1,557,437
Maximum number of shares to any individual (in shares)	1,000,000
Plan 2016 \| Common Stock
Stock Based Compensation Details [Line Items]
Shares of common stock options outstanding (in shares)			611,895
Plan 2016 \| Restricted Stock
Stock Based Compensation Details [Line Items]
RSUs outstanding (in shares)			69,538
Plan 2016, Plan 2009 And Director Plan [Member] \| Employee Stock Option
Stock Based Compensation Details [Line Items]
Shares of common stock options outstanding (in shares)			4,454,261