Activity in Derivatives and Warrants Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Aug. 31, 2013	Aug. 31, 2012	Aug. 31, 2013	Aug. 31, 2012
March Warrants
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Issuance			$ 1,000
Common stock warrant liability
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at beginning of period	2,081	4,070	1,160	11,087
Cancellation of March and June Warrants	(6,320)		(6,320)
Warrants exercised at fair value		(70)		(70)
Change in fair value of common stock warrant liabilities	2,830	2,084	2,751	(4,933)
Balance at end of period	7,284	6,084	7,284	6,084
Common stock warrant liability \| March Warrants
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Issuance			1,000
Common stock warrant liability \| June Warrant
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Issuance	1,026		1,026
Common stock warrant liability \| August Warrants
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Issuance	7,667		7,667
Derivative Liabilities
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at beginning of period	1,136
Issuance	5,861		5,939
Change in fair value of common stock warrant liabilities	(78)		980
Balance at end of period	5,478		5,478
Derivative Liabilities \| Loan Agreement Modifications
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Change in fair value of common stock warrant liabilities	$ (1,441)		$ (1,441)

OCZ TECHNOLOGY GROUP INC 10-Q/A