Represents the number of active plans under which future awards may be granted.

No definition available.

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- Definition

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

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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
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- References

No definition available.

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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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- Definition

Unrecognized cost of unvested share-based compensation awards.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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No definition available.

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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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- Definition

The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

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-Name Accounting Standards Codification
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- Definition

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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STOCK-BASED COMPENSATION (Details - Plan Information and P&L Impact)	12 Months Ended
	Dec. 31, 2016 USD ($) plan shares	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Number of active plans \| plan	1
Number of shares authorized \| shares	4,350,000.00
Term of plan	10 years
Non-cash compensation expense related to equity awards
Non-cash stock-based compensation expense before income taxes	$ 9,647,000	$ 8,508,000	$ 7,446,000
Income tax benefit related to non-cash compensation	3,700,000	3,000,000	0
Performance Shares [Member]
Unrecognized compensation cost
Unrecognized compensation cost	$ 1,700,000
Weighted-average period for recognition of unrecognized compensation cost	1 year 11 months 5 days
Stock Options
Unrecognized compensation cost
Unrecognized compensation cost	$ 7,800,000
Weighted-average period for recognition of unrecognized compensation cost	1 year 6 months 10 days
RSUs
Unrecognized compensation cost
Unrecognized compensation cost	$ 7,500,000
Weighted-average period for recognition of unrecognized compensation cost	1 year 11 months
Restricted Stock
Unrecognized compensation cost
Unrecognized compensation cost	$ 100,000
Weighted-average period for recognition of unrecognized compensation cost	5 months
Cost of revenue
Non-cash compensation expense related to equity awards
Non-cash stock-based compensation expense before income taxes	$ 129,000	95,000	32,000
Selling and marketing expense
Non-cash compensation expense related to equity awards
Non-cash stock-based compensation expense before income taxes	2,722,000	1,597,000	901,000
General and administrative expense
Non-cash compensation expense related to equity awards
Non-cash stock-based compensation expense before income taxes	4,699,000	5,120,000	5,148,000
Product development
Non-cash compensation expense related to equity awards
Non-cash stock-based compensation expense before income taxes	2,097,000	1,558,000	1,196,000
Restructuring and severance
Non-cash compensation expense related to equity awards
Non-cash stock-based compensation expense before income taxes	$ 0	$ 138,000	$ 169,000