Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Sep. 30, 2011
Current assets:
Cash and cash equivalents	$ 95,384	$ 83,863	[1]
Restricted cash	7,010	6,786	[1]
Short-term investments	4,481	4,761	[1]
Accounts receivable, net	36,844	39,460	[1]
Inventories	47,842	56,796	[1]
Deferred tax assets	11,867	10,044	[1]
Other current assets	7,473	6,325	[1]
Total current assets	210,901	208,035	[1]
Property, equipment and leasehold improvements, net	30,129	28,959	[1]
Purchased intangible assets, net	10,130	11,081	[1]
Goodwill	9,463	9,463	[1]
Deferred tax assets	19,002	19,028	[1]
Other assets	18,631	15,421	[1]
Total assets	298,256	291,987	[1]
Current liabilities:
Accounts payable	30,545	36,395	[1]
Accrued compensation and benefits	4,981	6,363	[1]
Accrued expenses	8,205	4,711	[1]
Total current liabilities	43,731	47,469	[1]
Other long-term liabilities	5,145	9,272	[1]
Total liabilities	48,876	56,741	[1]
Commitments and contingencies			[1]
Stockholders’ equity:
Common stock	3	3	[1]
Additional paid-in capital	326,139	321,131	[1]
Accumulated deficit	(79,937)	(87,328)	[1]
Accumulated other comprehensive income (loss)	1,804	(1,252)	[1]
Total ISSI stockholders’ equity	248,009	232,554	[1]
Noncontrolling interest	1,371	2,692	[1]
Total stockholders’ equity	249,380	235,246	[1]
Total liabilities and stockholders’ equity	$ 298,256	$ 291,987	[1]

[1] Derived from audited financial statements.