7. INCOME TAXES (Details 3) (USD $) In Thousands, unless otherwise specified	May 31, 2013	May 31, 2012
Components of Deferred Tax Assets
Net operating losses	$ 11,903	$ 11,106
Credit carryforwards	4,028	3,696
Inventory reserves	2,667	2,686
Reserves and accruals	2,913	2,957
Other	679	665
Gross deferred tax assets	22,190	21,110
Less: Valuation allowance	(22,190)	(21,110)
Net deferred tax assets	$ 0	$ 0