Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2010
Cash flows from operating activities:
Consolidated net income (loss)	$ (2,605)		$ 56,123		$ 42,755
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Stock-based compensation	5,031		4,042		2,497
Depreciation and amortization	5,569		4,831		3,530
Amortization of intangibles	1,848		1,698		1,019
Impairment of and write-off of intangibles	8,887		145		0
Impairment of goodwill	4,261		0		0
Impairment of assets	1,182		0		0
Impairment of investment	2,327		0		0
Net gain on sale of investments	0		(560)		(2,761)
Equity in net income of affiliate	0		(233)		0
Loss on the deconsolidation of Giantec	0		30		0
Provision for (recovery of) bad debts	(2)	[1]	362	[1]	13	[1]
Net foreign currency transaction (gains) losses	640		(436)		(87)
Deferred tax assets	5,016		(28,362)		0
Other non-cash items	110		285		259
Changes in operating assets and liabilities:
Accounts receivable	(1,290)		721		(14,415)
Inventories	(2,735)		(2,026)		(34,044)
Other assets	(256)		(1,100)		(1,040)
Deposit to foundry for capacity	0		0		(10,000)
Accounts payable	2,444		(2,899)		13,909
Accrued expenses and other liabilities	1,928		(2,057)		2,113
Net cash provided by operating activities	32,355		30,564		3,748
Cash flows from investing activities:
Acquisition of property, equipment and leasehold improvements	(6,036)		(6,349)		(8,084)
Acquisition of noncontrolling interest in Wintram	(2,370)		0		0
Investment in Nanya Technology Corporation (Nanya)	(27,109)		0		0
Investment in joint venture	(2,000)		0		0
Proceeds from sale of assets	0		20		0
Proceeds from sales of trading securities	0		0		19,950
Purchases of available-for-sale securities	(4,800)		(3,944)		(911)
Sales of available-for-sale securities	2,697		3,305		4,752
Investment in consolidated subsidiaries, net of cash and cash equivalents acquired	(13,210)		(15,960)		(50)
Reduction in cash balances upon deconsolidation of Giantec	0		(6,455)		0
Proceeds from noncontrolling interest of consolidated subsidiary	0		0		3,785
Proceeds from sale of investments	0		2,768		3,216
Decrease (increase) in restricted cash	6,786		(1,679)		(5,107)
Net cash provided by (used in) investing activities	(46,042)		(28,294)		17,551
Cash flows from financing activities:
Repurchases and retirements of common stock	(537)		(4,097)		(1,108)
Proceeds from issuance of stock through compensation plans	5,852		3,385		5,967
Proceeds from borrowings under short-term lines of credit	20,809		11,750		0
Principal payments of short-term lines of credit	(20,809)		(11,750)		0
Net cash provided by (used in) financing activities	5,315		(712)		4,859
Effect of exchange rate changes on cash and cash equivalents	6		640		563
Net increase (decrease) in cash and cash equivalents	(8,366)		2,198		26,721
Cash and cash equivalents at beginning of year	83,863		81,665		54,944
Cash and cash equivalents at end of year	75,497		83,863		81,665
Supplemental disclosures of cash flow information:
Cash paid (refunded) for income taxes	875		1,601		865
Cash paid for interest expense	$ 25		$ 23		$ 0

[1] Includes increases/(decreases) charged or credited to costs and expenses.