Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Cash flows from operating activities
Consolidated net income	$ 14,404		$ 5,768
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	3,724		2,746
Stock-based compensation	3,046		2,909
Excess tax benefits from share-based compensation	(658)		0
Amortization of intangibles	818		793
Gain on sale of investments	(9,160)		(2,059)
Equity in net loss of affiliate	139		160
Net foreign currency transaction gains	(456)		(259)
Deferred tax assets	224		2,480
Other non-cash items	35		36
Net effect of changes in current and other assets and current liabilities	(14,925)		(7,036)
Net cash provided by (used in) operating activities	(2,809)		5,538
Cash flows from investing activities
Acquisition of property and equipment	(8,310)		(10,520)
Acquisition of noncontrolling interest in consolidated subsidiary	(199)		0
Payment of license fees	(6,000)		0
Payment of holdback related to Si En acquisition	0		4,200
Increase in restricted cash	1,000		0
Purchases of available-for-sale securities	(1,218)		(4,330)
Sales of available-for-sale securities	18,190		9,113
Cash provided by (used in) investing activities	1,463		(9,937)
Cash flows from financing activities
Repurchases and retirement of common stock	(350)		(547)
Proceeds from issuance of stock through compensation plans	7,316		2,151
Excess tax benefit from share-based compensation	658		0
Proceeds from borrowings	0		4,875
Principal payments of long-term obligations	(98)		(49)
Proceeds from borrowings under short-term lines of credit	0		3,393
Principal payments of short-term lines of credit	0		3,393
Cash provided by financing activities	7,526		6,430
Effect of exchange rate changes on cash and cash equivalents	(1,398)		(476)
Net increase in cash and cash equivalents	4,782		1,555
Cash and cash equivalents at beginning of period	119,997	[1]	75,497
Cash and cash equivalents at end of period	$ 124,779		$ 77,052

[1] Derived from audited financial statements.