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.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 1

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

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- Definition

Unrecognized cost of unvested share-based compensation awards.

+ References

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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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SHARE INCENTIVE PLANS: (Details 4) (USD $)	3 Months Ended		12 Months Ended
SHARE INCENTIVE PLANS: (Details 4) (USD $)	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Share-based compensation expense
Total share-based compensation expense	$ 11,718,000	$ 11,638,000
Total unrecognized share-based compensation costs related to non-vested awards	98,500,000		74,500,000
Weighted average period for recognition of unrecognized share-based compensation costs	2 years 1 month 17 days		1 year 11 months 19 days
Cost of goods sold
Share-based compensation expense
Total share-based compensation expense	547,000	522,000
Research and development
Share-based compensation expense
Total share-based compensation expense	6,768,000	6,678,000
Sales and marketing
Share-based compensation expense
Total share-based compensation expense	2,394,000	2,433,000
General and administrative
Share-based compensation expense
Total share-based compensation expense	$ 2,009,000	$ 2,005,000