Fair Value (Details) (Recurring basis, USD $)	Dec. 31, 2014	Dec. 31, 2013
Level 1
ASSETS
Cash equivalents	$ 18,319,000	$ 26,476,000
Financial instrument associated with stock purchase agreement
Total assets	18,319,000	26,476,000
Other liabilities measured at fair value:
Scottish Enterprise agreement
Other liabilities measured at fair value
Total liabilities
Level 2
ASSETS
Cash equivalents
Financial instrument associated with stock purchase agreement	51,000	397,000
Total assets	51,000	397,000
Other liabilities measured at fair value:
Scottish Enterprise agreement
Other liabilities measured at fair value
Total liabilities
Level 3
ASSETS
Cash equivalents
Financial instrument associated with stock purchase agreement
Total assets
Other liabilities measured at fair value:
Scottish Enterprise agreement		20,000
Other liabilities measured at fair value		20,000
Total liabilities		20,000
Total
ASSETS
Cash equivalents	18,319,000	26,476,000
Financial instrument associated with stock purchase agreement	51,000	397,000
Total assets	18,370,000	26,873,000
Other liabilities measured at fair value:
Scottish Enterprise agreement		20,000
Other liabilities measured at fair value		20,000
Total liabilities		$ 20,000

Represents the fair value of financial instrument associated with stock purchase agreement.

No definition available.

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- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

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- Definition

Amount of short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash Equivalents

-URI http://asc.fasb.org/extlink&oid=6507016

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 1

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.1)

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- Definition

Fair value portion of guarantee, including, but not limited to, financial standby letter of credit, fair value guarantee, guarantee of collection of scheduled contractual cash flows from financial assets, and contracts that contingently require the guarantor to make payments or perform services.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 460

-SubTopic 10

-Section 50

-Paragraph 5

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12201-110248

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Fair value of financial and nonfinancial obligations.

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- Definition

Fair value portion of other liabilities.

+ References

No definition available.

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