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SHARE-BASED PAYMENTS - Schedule of Share-based Compensation, Stock Options, Activity (Details) - $ / shares | 9 Months Ended | 12 Months Ended
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Sep. 30, 2016 | Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] |  |
Weighted average exercise price, beginning of period (in dollars per share) | $ 6.54 | $ 10.05
Grants in period, weighted average exercise price (in dollars per share) | 2.13 | 6.02
Exercises in period, weighted average exercise price (in dollars per share) | 2.12 | 3.78
Forfeitures in period, weighted average exercise price (in dollars per share) | 5.95 | 7.29
Expirations in period, weighted average exercise price (in dollars per share) | 8.02 | 7.42
Weighted average exercise price, end of period (in dollars per share) | $ 5.81 | $ 6.54
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |  |
Number of options, beginning of period (in shares) | 2,122,897 | 905,413
Number of grants in period, net of forfeitures (in shares) | 449,540 | 2,176,330
Number of exercises in period (in shares) | (8,369) | (48,802)
Number of forfeitures in period (in shares) | (272,528) | (574,486)
Number of expirations in period (in shares) | (106,562) | (335,558)
Number of options, end of period (in shares) | 2,184,978 | 2,122,897
Minimum |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] |  |
Weighted average exercise price, beginning of period (in dollars per share) | $ 2.55 | $ 6.55
Grants in period, weighted average exercise price (in dollars per share) | 2.12 | 2.55
Exercises in period, weighted average exercise price (in dollars per share) |  | 2.55
Forfeitures in period, weighted average exercise price (in dollars per share) | 2.12 | 4.44
Expirations in period, weighted average exercise price (in dollars per share) | 2.95 | 7.47
Weighted average exercise price, end of period (in dollars per share) | 2.12 | 2.55
Maximum |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] |  |
Weighted average exercise price, beginning of period (in dollars per share) | 32.10 | 38.12
Grants in period, weighted average exercise price (in dollars per share) | 2.22 | 18.55
Exercises in period, weighted average exercise price (in dollars per share) | 2.12 | 4.48
Forfeitures in period, weighted average exercise price (in dollars per share) | 19.44 | 29.71
Expirations in period, weighted average exercise price (in dollars per share) | 32.78 | 32.10
Weighted average exercise price, end of period (in dollars per share) | $ 15.61 | $ 32.10

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- Definition Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements. + 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)(iv)(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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. + 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)(iv)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Net number of share options (or share units) granted during the period. + 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)(iv)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: 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 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + 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) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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