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Represents the maximum contribution that the employees may elect to contribute to a stock purchase plan during one calendar year.

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No definition available.

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Share Based Compensation Arrangement by Share Based Payment Award Equity Instruments Other than Options Contribution Per Employee Maximum Percentage

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Represents the offering period to purchase the common stock at a value lesser then the fair value.

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Represents the number of shares reserved for outstanding awards and the number of shares reserved for future grants.

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No definition available.

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The value of shares (or other type of equity) approved (usually by shareholders and board of directors), for awards that a member of the board of directors are entitled to receive upon election to the board.

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No definition available.

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The value of shares (or other type of equity) approved (usually by shareholders and board of directors) that a member of the board of directors are entitled to receive annually.

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No definition available.

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Represents the information pertaining to contractual term related to share-based award.

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No definition available.

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The period of time, from the grant date until the time at which the share-based award expires.

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No definition available.

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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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Unrecognized cost of unvested share-based compensation awards.

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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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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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Discount rate from fair value on offering date that participants pay for shares.

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

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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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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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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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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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Paragraph 2

-Subparagraph (a)(2)

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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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-Paragraph 2

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Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section S99

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-Subparagraph (SAB TOPIC 14.D.2)

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-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section D

-Subsection 2

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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

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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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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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Shareholders' Equity (Details) (USD $)	12 Months Ended			1 Months Ended	4 Months Ended
Shareholders' Equity (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2014	Dec. 31, 2014	Dec. 11, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation costs included in consolidated net loss (in dollars)	$ 11,405,000	$ 11,746,000	$ 7,551,000
Weighted Average Grant Date Fair Value
Common stock reserved for share-based awards outstanding and available future grants	14,613,642				14,613,642
Stock repurchase program, authorized amount						10,000,000
Continuing operations
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation costs included in consolidated net loss (in dollars)	11,405,000	11,746,000	7,282,000
Discontinued operations
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation costs included in consolidated net loss (in dollars)	0	0	269,000
Non-employee directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation costs included in consolidated net loss (in dollars)	842,000	558,000	517,000
President
Number of Options
Granted (in shares)				815,217
RSUs
Number of RSUs
Nonvested shares outstanding at the beginning of the period (in shares)	2,749,000
Granted (in shares)	3,770,000
Vested (in shares)	(2,298,000)
Forfeited (in shares)	(876,000)
Nonvested shares outstanding at the end of the period (in shares)	3,345,000	2,749,000			3,345,000
Weighted Average Grant Date Fair Value
Nonvested shares outstanding at the beginning of the period (in dollars per share)	$ 4.09
Granted (in dollars per share)	$ 4.09
Vested (in dollars per share)	$ 4.19
Forfeited (in dollars per share)	$ 4.20
Nonvested shares outstanding at the end of the period (in dollars per share)	$ 3.98	$ 4.09			3.98
Total fair value (in dollars)	9,700,000	6,800,000	2,900,000
Total unrecognized compensation cost (in dollars)	12,200,000				12,200,000
Weighted average period for recognition of unrecognized stock-based compensation expense	2 years 4 months 24 days
RSUs \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	1 year
RSUs \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
RSUs \| Non-employee directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Value of common stock granted initial grant	100,000
Value of common stock granted annual grant	100,000
RSUs \| Non-employee directors \| Initial grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
RSUs \| Non-employee directors \| Annual grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	1 year
RSUs \| President
Number of RSUs
Granted (in shares)				804,721
RSUs \| Chief Administrative Officer
Number of RSUs
Granted (in shares)				150,000
Stock option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual terms	10 years
Weighted average assumptions used to value options granted and the grant date fair value
Expected life (in years)	4 years 5 months 1 day		4 years 4 months 24 days
Risk-free interest rate	1.43%		0.63%
Expected volatility	52.00%		70.00%
Dividend yield	0.00%		0.00%
Fair value	$ 1.59		$ 2.13
Number of Options
Outstanding at the beginning of the period (in shares)	5,377,000
Granted (in shares)	815,000
Exercised (in shares)	(1,268,000)
Expired or cancelled (in shares)	(1,080,000)
Forfeited (in shares)	(90,000)
Outstanding at the end of the period (in shares)	3,754,000	5,377,000			3,754,000
Vested and expected to vest at the end of the period (in shares)	3,654,000				3,654,000
Exercisable at the end of the period (in shares)	2,938,000				2,938,000
Weighted Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)	$ 4.33
Granted (in dollars per share)	$ 3.68
Exercised (in dollars per share)	$ 3.46
Expired or canceled (in dollars per share)	$ 6.89
Forfeited (in dollars per share)	$ 3.41
Outstanding at the end of the period (in dollars per share)	$ 3.76	$ 4.33			3.76
Vested and expected to vest at the end of the period (in dollars per share)	$ 3.77				3.77
Exercisable at the end of the period (in dollars per share)	$ 3.80				3.80
Weighted Average Remaining Contractual Term
Outstanding at the end of the period	2 years 11 months 5 days
Vested and expected to vest at the end of the period	2 years 9 months 26 days
Exercisable at the end of the period	1 year 11 months 9 days
Aggregate Intrinsic Value
Outstanding at the end of the period	1,305,000				1,305,000
Vested and expected to vest at the end of period	1,303,000				1,303,000
Exercisable at the end of the period	1,262,000				1,262,000
Total intrinsic value of options exercised	1,200,000	500,000	300,000
Stock option \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual terms	10 years
Stock option \| President
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period					2 years 6 months
Options expiration period					7 years
2004 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares of common stock authorized for issuance	20,350,000				20,350,000
Number of share available for future grants	7,513,976				7,513,976
2004 Plan \| Stock option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual terms	7 years
2004 Plan \| Stock option \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual terms	4 years
2004 Plan \| Stock option \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual terms	10 years
Expiration term	10 years
ESPP
Weighted Average Grant Date Fair Value
Contribution of compensation by the employees per calendar year, percentage	10.00%
Contribution of compensation by the employees per calendar year	$ 10,000
Percentage of the discount fair market value of common stock	95.00%
Offering period	3 months
Number of shares issued	184,000	206,000	281,000
Share-based Compensation Award, Tranche One [Member] \| 2004 Plan \| Stock option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	6 months
Share-based Compensation Award, Tranche Two [Member] \| 2004 Plan \| Stock option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	2 years 6 months