Annual report pursuant to Section 13 and 15(d)

Marketable Securities - Additional Information (Detail)

v2.4.1.9
Marketable Securities - Additional Information (Detail) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Corporate debt securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Marketable securities contractual maturities Less than one year  
Debt Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Marketable investments continuous unrealized loss position 0cyma_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLossesAccumulatedInInvestments
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_DebtSecuritiesMember
$ 0cyma_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLossesAccumulatedInInvestments
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_DebtSecuritiesMember
Asset-backed securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Marketable securities contractual maturities Between 2-5 years