XML 21 R33.htm IDEA: XBRL DOCUMENT v2.4.1.9
Fair Values on Financial Assets and Liabilities (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Fair value of financial assets and liabilities    
Total financial assets $ 99,471us-gaap_AvailableForSaleSecurities $ 33,426us-gaap_AvailableForSaleSecurities
Total financial liabilities 4,189us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisObligations 10,485us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisObligations
Money market funds    
Fair value of financial assets and liabilities    
Total financial assets 5,512us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_MoneyMarketFundsMember		 [1] 3,912us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_MoneyMarketFundsMember		 [2]
Corporate debt securities    
Fair value of financial assets and liabilities    
Total financial assets 20,552us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_CorporateDebtSecuritiesMember		 [3] 26,088us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_CorporateDebtSecuritiesMember		 [4]
United States government agency securities    
Fair value of financial assets and liabilities    
Total financial assets 73,407us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_USGovernmentAgenciesDebtSecuritiesMember		 [3] 3,426us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_USGovernmentAgenciesDebtSecuritiesMember		 [4]
Warrant Liability    
Fair value of financial assets and liabilities    
Total financial liabilities 4,189us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisObligations
/ us-gaap_FairValueByLiabilityClassAxis
= cers_WarrantLiabilityMember		 [5] 10,485us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisObligations
/ us-gaap_FairValueByLiabilityClassAxis
= cers_WarrantLiabilityMember		 [6]
Level 1    
Fair value of financial assets and liabilities    
Total financial assets 5,512us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member		 3,912us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
Total financial liabilities 0us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisObligations
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member		 0us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisObligations
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
Level 1 | Money market funds    
Fair value of financial assets and liabilities    
Total financial assets 5,512us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_MoneyMarketFundsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member		 [1] 3,912us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_MoneyMarketFundsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member		 [2]
Level 1 | Corporate debt securities    
Fair value of financial assets and liabilities    
Total financial assets 0us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_CorporateDebtSecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member		 [3] 0us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_CorporateDebtSecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member		 [4]
Level 1 | United States government agency securities    
Fair value of financial assets and liabilities    
Total financial assets 0us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_USGovernmentAgenciesDebtSecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member		 [3] 0us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_USGovernmentAgenciesDebtSecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member		 [4]
Level 1 | Warrant Liability    
Fair value of financial assets and liabilities    
Total financial liabilities 0us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisObligations
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByLiabilityClassAxis
= cers_WarrantLiabilityMember		 [5] 0us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisObligations
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByLiabilityClassAxis
= cers_WarrantLiabilityMember		 [6]
Level 2    
Fair value of financial assets and liabilities    
Total financial assets 93,959us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member		 29,514us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
Total financial liabilities 0us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisObligations
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member		 0us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisObligations
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
Level 2 | Money market funds    
Fair value of financial assets and liabilities    
Total financial assets 0us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_MoneyMarketFundsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member		 [1] 0us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_MoneyMarketFundsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member		 [2]
Level 2 | Corporate debt securities    
Fair value of financial assets and liabilities    
Total financial assets 20,552us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_CorporateDebtSecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member		 [3] 26,088us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_CorporateDebtSecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member		 [4]
Level 2 | United States government agency securities    
Fair value of financial assets and liabilities    
Total financial assets 73,407us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_USGovernmentAgenciesDebtSecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member		 [3] 3,426us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_USGovernmentAgenciesDebtSecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member		 [4]
Level 2 | Warrant Liability    
Fair value of financial assets and liabilities    
Total financial liabilities 0us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisObligations
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByLiabilityClassAxis
= cers_WarrantLiabilityMember		 [5] 0us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisObligations
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByLiabilityClassAxis
= cers_WarrantLiabilityMember		 [6]
Level 3    
Fair value of financial assets and liabilities    
Total financial assets 0us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member		 0us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
Total financial liabilities 4,189us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisObligations
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member		 10,485us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisObligations
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
Level 3 | Money market funds    
Fair value of financial assets and liabilities    
Total financial assets 0us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_MoneyMarketFundsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member		 [1] 0us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_MoneyMarketFundsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member		 [2]
Level 3 | Corporate debt securities    
Fair value of financial assets and liabilities    
Total financial assets 0us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_CorporateDebtSecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member		 [3] 0us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_CorporateDebtSecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member		 [4]
Level 3 | United States government agency securities    
Fair value of financial assets and liabilities    
Total financial assets 0us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_USGovernmentAgenciesDebtSecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member		 [3] 0us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_USGovernmentAgenciesDebtSecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member		 [4]
Level 3 | Warrant Liability    
Fair value of financial assets and liabilities    
Total financial liabilities $ 4,189us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisObligations
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByLiabilityClassAxis
= cers_WarrantLiabilityMember		 [5] $ 10,485us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisObligations
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByLiabilityClassAxis
= cers_WarrantLiabilityMember		 [6]
[1] Included in cash and cash equivalents on the Company's unaudited condensed consolidated balance sheets.
[2] Included in cash and cash equivalents on the Company's consolidated balance sheets.
[3] Included in short-term investments on the Company's unaudited condensed consolidated balance sheets.
[4] Included in short-term investments on the Company's consolidated balance sheets, except for approximately $1.0 million of corporate debt securities that are included in cash and cash equivalents on the Company's consolidated balance sheets.
[5] Included in current liabilities on the Company's unaudited condensed consolidated balance sheets.
[6] Included in current liabilities on the Company's consolidated balance sheets.