Business Combinations (Tables)
 12 Months Ended
Oct. 31, 2012
Business Combinations [Abstract]  
Estimated fair value of the acquired assets and assumed liabilities
The following table summarizes the final purchase price allocation related to the MEN Business, based on the estimated fair value of the acquired assets and assumed liabilities (in thousands):


 
Final
 
Allocation
Unbilled receivables
$
7,136

Inventories
146,272

Prepaid expenses and other
32,517

Other long-term assets
21,924

Equipment, furniture and fixtures
41,213

Developed technology
218,774

In-process research and development
11,000

Customer relationships, outstanding purchase orders and contracts
260,592

Trade name
2,000

Deferred revenue
(28,086
)
Accrued liabilities
(33,845
)
Other long-term obligations
(2,644
)
Total purchase price allocation
$
676,853
Pro forma of financial information
The following unaudited pro forma financial information summarizes the results of operations for the period indicated as if Ciena's acquisition of the MEN Business had been completed as of the beginning of the period presented. These pro forma amounts (in thousands) do not purport to be indicative of the results that would have actually been obtained if the acquisition occurred as of the beginning of the period presented or that may be obtained in the future.

 
Fiscal Year
 
 
2010
Pro forma revenue
 
$
1,592,911

Pro forma net loss
 
$
(536,253
)