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v2.4.1.9

Difference Between Provision for Income Taxes and Amounts Computed by Applying Federal Statutory Income Tax Rate to Loss before Taxes (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Reconciliation of Provision of Income Taxes [Line Items] |  |  |
Federal statutory tax | $ (13,110)us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate | $ (14,661)us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate | $ (5,329)us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
Stock-based compensation | (8)us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost | (10)us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost | 99 us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost
Lobbying expenses | 33 cers_IncomeTaxReconciliationNondeductibleExpenseLobbyingExpenses | 107 cers_IncomeTaxReconciliationNondeductibleExpenseLobbyingExpenses | 51 cers_IncomeTaxReconciliationNondeductibleExpenseLobbyingExpenses
Warrants | (3,367)cers_IncomeTaxReconciliationChangeInFairValueOfWarrants | 4,926 cers_IncomeTaxReconciliationChangeInFairValueOfWarrants | (706)cers_IncomeTaxReconciliationChangeInFairValueOfWarrants
Foreign rate differential | 43 us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential | (121)us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential | (53)us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential
Expiration of federal net operating losses and credits-tax effected | 0 cers_IncomeTaxReconciliationExpirationOfFederalNetOperatingLosses | 0 cers_IncomeTaxReconciliationExpirationOfFederalNetOperatingLosses | 4,352 cers_IncomeTaxReconciliationExpirationOfFederalNetOperatingLosses
Change in valuation allowance | 16,576 us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance | 9,955 us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance | 1,809 us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance
Other | 28 us-gaap_IncomeTaxReconciliationOtherAdjustments | 22 us-gaap_IncomeTaxReconciliationOtherAdjustments | 19 us-gaap_IncomeTaxReconciliationOtherAdjustments
Provision for income taxes | $ 195 us-gaap_IncomeTaxExpenseBenefit | $ 218 us-gaap_IncomeTaxExpenseBenefit | $ 242 us-gaap_IncomeTaxExpenseBenefit

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- Definition Income Tax Reconciliation, Expiration of Federal Net Operating Losses + References No definition available. + Details
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- Definition Income Tax Reconciliation, Nondeductible Expense, Lobbying Expenses + References No definition available. + Details
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- Definition 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)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 3: http://www.xbrl.org/2003/role/presentationRef -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) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=37586315&loc=d3e32123-109318 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to foreign income tax expense (benefit). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Subparagraph 1 -Article 4 + Details
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- Definition The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Subparagraph 2 -Article 4 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible equity-based compensation costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 + Details
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