Consolidated Balance Sheet (Going Concern Basis) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2012
Current assets:
Cash and cash equivalents	$ 136,654
Short-term investments	234,965
Accounts receivable, net of allowance for doubtful accounts of $42 at July 31, 2012	7,785
Inventories	8,469
Prepaid and other current assets	1,589
Total current assets	389,462
Property and equipment, net	4,276
Long-term investments	67,774
Other assets	422
Total assets	461,934
Current liabilities:
Accounts payable	1,432
Accrued compensation	2,836
Accrued warranty	1,072
Accrued expenses	2,248
Deferred revenue	7,871
Other current liabilities	813
Total current liabilities	16,272
Long term deferred revenue	1,469
Other long term liabilities	1,962
Total liabilities	19,703
Commitments and contingencies (Note 10)
Stockholders' equity:
Preferred stock, $.01 par value; 5,000 shares authorized; none issued or outstanding
Common stock, $.001 par value; 250,000 shares authorized; 28,879 shares issued and outstanding at July 31, 2012	29
Additional paid-in capital	1,589,357
Accumulated deficit	(1,146,882)
Accumulated other comprehensive loss	(273)
Total stockholders' equity	442,231
Total liabilities and stockholders' equity	$ 461,934