Fair Value Measurements (Tables)

6 Months Ended

Apr. 30, 2013

Fair Value Disclosures [Abstract]

Summary of the fair value of assets recorded on a recurring basis

As of the date indicated, the following table summarizes the fair value of assets and liabilities that are recorded at fair value on a recurring basis (in thousands):

	April 30, 2013
	Level 1		Level 2		Level 3		Total
Assets:
U.S. government obligations	$	99,973	$	—	$	—	$	99,973
Foreign currency forward contracts	—		52		—		52
Embedded redemption feature	—		—		220		220
Total assets measured at fair value	$	99,973	$	52	$	220	$	100,245
Liabilities:
Foreign currency forward contracts	$	—	$	67	$	—	$	67
Total liabilities measured at fair value	$	—	$	67	$	—	$	67

Assets are presented on Ciena's Condensed Consolidated Balance Sheet

As of the date indicated, the assets and liabilities above were presented on Ciena’s Condensed Consolidated Balance Sheet as follows (in thousands):

	April 30, 2013
	Level 1		Level 2		Level 3		Total
Assets:
Short-term investments	$	99,973	$	—	$	—	$	99,973
Prepaid expenses and other	—		52		—		52
Other long-term assets	—		—		220		220
Total assets measured at fair value	$	99,973	$	52	$	220	$	100,245
Liabilities:
Accrued liabilities	$	—	$	67	$	—	$	67
Total liabilities measured at fair value	$	—	$	67	$	—	$	67

Reconciliation of changes in Level 3 fair value measurements

As of the dates indicated, the following table sets forth, in thousands, the reconciliation of changes in fair value measurements of Level 3 assets:

	Level 3
Balance at October 31, 2012	$	420
Issuances	—
Settlements	(630		)
Changes in unrealized gain (loss)	430
Transfers into Level 3	—
Transfers out of Level 3	—
Balance at April 30, 2013	$	220