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Accrued Expenses - Schedule of Accrued Expenses (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Payables And Accruals [Abstract] |  |
Accrued expenses | $ 663 ceru_AccruedExpensesCurrent | $ 379 ceru_AccruedExpensesCurrent
Accrued clinical trial costs | 848 ceru_AccruedClinicalTrialCostsCurrent | 610 ceru_AccruedClinicalTrialCostsCurrent
Accrued contract manufacturing expenses | 580 ceru_AccruedManufacturingExpensesCurrent | 433 ceru_AccruedManufacturingExpensesCurrent
Accrued compensation and benefits | 983 us-gaap_EmployeeRelatedLiabilitiesCurrent | 618 us-gaap_EmployeeRelatedLiabilitiesCurrent
Accrued interest | 574 ceru_DebtInstrumentAccruedInterest | 234 ceru_DebtInstrumentAccruedInterest
Total accrued expenses | $ 3,648 us-gaap_AccruedLiabilitiesCurrent | $ 2,274 us-gaap_AccruedLiabilitiesCurrent

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- Definition Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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