INCOME TAXES (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014
Income Taxes
Provision or benefit for federal or state income taxes	$ 0us-gaap_IncomeTaxExpenseBenefit
Research and development
Income Taxes
Research and development tax credit carryforwards	867
Beginning of expiration research and development tax credit carryforwards	2021
Federal
Income Taxes
Net operating loss carryforwards	58,293
Expiration of Federal net operating loss carryforwards	2026
Massachusetts
Income Taxes
Net operating loss carryforwards	$ 50,568
Operating losses carry forward expiration year	2011

Federal net operating loss carryforwards expiration year.

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Operating losses carry forward expiration year.

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Tax credit carry forward expiration year.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(h))

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-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph h

-Article 4

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Income Tax Expense (or Benefit)

-URI http://asc.fasb.org/extlink&oid=6515339

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 9

-Subparagraph (a),(b)

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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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-Name Accounting Standards Codification

-Topic 740

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