v3.6.0.2

STOCK-BASED COMPENSATION - Plans by Exercise Price (Details)	12 Months Ended
	Dec. 31, 2016 $ / shares shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Options Outstanding | shares	6,219,774
Weighted Average Remaining Contractual Term	6 years 5 months 1 day
Weighted Average Exercise Price per Share (in dollars per share)	$ 6.15
Number of Options Exercisable | shares	4,086,597
Weighted Average Exercise Price per Share (in dollars per share)	$ 5.67
$0.25 - $2.05
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower (in dollars per share)	0.25
Exercise price range, upper (in dollars per share)	$ 2.05
Number of Options Outstanding | shares	1,183,702
Weighted Average Remaining Contractual Term	3 years 10 months 10 days
Weighted Average Exercise Price per Share (in dollars per share)	$ 1.30
Number of Options Exercisable | shares	1,160,368
Weighted Average Exercise Price per Share (in dollars per share)	$ 1.28
$2.28 - $6.00
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower (in dollars per share)	2.28
Exercise price range, upper (in dollars per share)	$ 6.00
Number of Options Outstanding | shares	1,358,528
Weighted Average Remaining Contractual Term	6 years 4 months 13 days
Weighted Average Exercise Price per Share (in dollars per share)	$ 5.27
Number of Options Exercisable | shares	1,104,796
Weighted Average Exercise Price per Share (in dollars per share)	$ 5.22
$6.09 - $6.85
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower (in dollars per share)	6.09
Exercise price range, upper (in dollars per share)	$ 6.85
Number of Options Outstanding | shares	1,041,000
Weighted Average Remaining Contractual Term	8 years 7 months 13 days
Weighted Average Exercise Price per Share (in dollars per share)	$ 6.26
Number of Options Exercisable | shares	215,308
Weighted Average Exercise Price per Share (in dollars per share)	$ 6.28
$7.15 - $7.48
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower (in dollars per share)	7.15
Exercise price range, upper (in dollars per share)	$ 7.48
Number of Options Outstanding | shares	1,039,063
Weighted Average Remaining Contractual Term	7 years 4 months 24 days
Weighted Average Exercise Price per Share (in dollars per share)	$ 7.17
Number of Options Exercisable | shares	417,772
Weighted Average Exercise Price per Share (in dollars per share)	$ 7.17
$7.98 - $9.56
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower (in dollars per share)	7.98
Exercise price range, upper (in dollars per share)	$ 9.56
Number of Options Outstanding | shares	73,826
Weighted Average Remaining Contractual Term	5 years 8 months 23 days
Weighted Average Exercise Price per Share (in dollars per share)	$ 8.38
Number of Options Exercisable | shares	58,638
Weighted Average Exercise Price per Share (in dollars per share)	$ 8.31
$9.58 - $11.31
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower (in dollars per share)	9.58
Exercise price range, upper (in dollars per share)	$ 11.31
Number of Options Outstanding | shares	1,523,655
Weighted Average Remaining Contractual Term	6 years 4 months 2 days
Weighted Average Exercise Price per Share (in dollars per share)	$ 9.81
Number of Options Exercisable | shares	1,129,715
Weighted Average Exercise Price per Share (in dollars per share)	$ 9.82

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- Definition

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(iii)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iii)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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