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Current Accrued Expenses - Schedule of Current Accrued Expenses (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
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Payables And Accruals [Abstract] |  |
Clinical trial expenses | $ 869 | $ 1,365
Compensation, excluding taxes | 1,124 | 933
Professional fees | 221 | 286
Short-term portion of lease restructuring | 209 | 216
Other | 985 | 607
Total accrued expenses | $ 3,408 | $ 3,407

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- Definition Carrying amount as of the balance sheet date of known and estimated obligations associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid in the next twelve months or in the normal operating cycle if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)(2)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 + Details
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