Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Additional Information (Detail)

v2.4.1.9
Commitments and Contingencies - Additional Information (Detail) (USD $)
12 Months Ended 0 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Nov. 08, 2013
sqft
Loss Contingencies [Line Items]      
Rent expenses $ 400,000us-gaap_OperatingLeasesRentExpenseNet $ 500,000us-gaap_OperatingLeasesRentExpenseNet  
Operating leases term   4 years  
Lease expiration date   Apr. 30, 2014  
Accrued in the balance sheets related to indemnification obligations 0us-gaap_CapitalLeaseObligations    
Indemnification liabilities $ 0cyma_IndemnificationLiability $ 0cyma_IndemnificationLiability  
New Lease Agreement [Member]      
Loss Contingencies [Line Items]      
Lease start date     Jan. 16, 2014
Lease expiration date     Dec. 31, 2018
Area of office space     8,894cyma_AreaOfOfficeSpace
/ us-gaap_LeaseArrangementTypeAxis
= us-gaap_LeaseAgreementsMember