STOCK PLANS (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Share-Based Compensation
Shares issued under employee stock purchase plan (shares)			19,883
Stock-based compensation expense	$ 7,296	$ 5,537	$ 14,813	$ 9,512
Compensation expense from stock options, employees	6,739	3,550
Compensation expense from stock options			13,049	5,960
Compensation expense from stock options, non-employee awards	(54)	1,987	942	3,552
Restricted Stock or Unit Expense	369	0	369	0
Compensation expense from employee stock purchase plan	242	0	453	0
Stock-based compensation	7,296	5,537	14,813	9,512
Cost of goods sold
Share-Based Compensation
Stock-based compensation expense	1,586	641	2,689	1,135
Research and development
Share-Based Compensation
Stock-based compensation expense	561	2,137	2,070	3,714
Selling, general and administrative
Share-Based Compensation
Stock-based compensation expense	$ 5,149	$ 2,759	$ 10,054	$ 4,663

Compensation expense from employee stock purchase plan

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- Definition

Compensation expense from stock options

+ References

No definition available.

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- Definition

Compensation expense from stock options (employee and board of director awards)

+ References

No definition available.

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- Definition

Compensation expense from stock options, non-employee awards

+ 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.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 14.F)

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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

The noncash expense that represents the cost of restricted stock or unit distributed to employees as compensation.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

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-Section 45

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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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- Definition

Number of shares issued during the period as a result of an employee stock purchase plan.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5

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