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Fair Value (Details) - Recurring basis - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Level 1
ASSETS
Cash equivalents	$ 11,953	$ 18,319
Financial instrument associated with stock purchase agreement
Total assets	$ 11,953	$ 18,319
Level 2
ASSETS
Cash equivalents
Financial instrument associated with stock purchase agreement		$ 51
Total assets		$ 51
Level 3
ASSETS
Cash equivalents
Financial instrument associated with stock purchase agreement
Total assets
Total
ASSETS
Cash equivalents	$ 11,953	$ 18,319
Financial instrument associated with stock purchase agreement		51
Total assets	$ 11,953	$ 18,370

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- Definition

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

+ References

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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
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.1)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Cash Equivalents
-URI http://asc.fasb.org/extlink&oid=6507016

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