Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Sep. 30, 2011
Current assets:
Cash and cash equivalents	$ 75,497	$ 83,863
Restricted cash	0	6,786
Short-term investments	6,541	4,761
Accounts receivable, net of allowance for doubtful accounts of $508 in 2012 and $496 in 2011	47,710	39,460
Inventories	66,964	56,796
Deferred tax assets	8,940	10,044
Other current assets	12,264	6,325
Total current assets	217,916	208,035
Property, equipment and leasehold improvements, net	29,286	28,959
Goodwill	9,178	9,463
Purchased intangible assets, net	8,226	11,081
Deferred tax assets	13,588	19,028
Other assets	38,877	15,421
Total assets	317,071	291,987
Current liabilities:
Accounts payable	44,705	36,395
Accrued compensation and benefits	9,420	6,363
Accrued expenses	11,133	4,711
Total current liabilities	65,258	47,469
Other long-term liabilities	5,478	9,272
Total liabilities	70,736	56,741
Commitments and contingencies (See Note 16)
Stockholders' equity:
Preferred stock, $0.0001 par value: Authorized shares-5,000 in 2012 and 2011. No shares outstanding	0	0
Common stock, $0.0001 par value: Authorized shares-70,000 in 2012 and 2011. Issued and outstanding shares-27,594 in 2012 and 26,448 in 2011	3	3
Additional paid-in capital	330,473	321,131
Accumulated deficit	(90,046)	(87,328)
Accumulated other comprehensive loss	2,399	(1,252)
Total ISSI stockholders' equity	242,829	232,554
Noncontrolling interest	3,506	2,692
Total stockholders' equity	246,335	235,246
Total liabilities and stockholders' equity	$ 317,071	$ 291,987