Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Cash flows from operating activities
Consolidated net income	$ 5,768		$ 7,366
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	2,746		2,726
Stock-based compensation	2,909		2,447
Amortization of intangibles	793		951
Gain on sale of investments	(2,059)		0
Equity in net income of affiliate	160		0
Net foreign currency transaction losses	(259)		643
Deferred tax assets	2,480		2,702
Other non-cash items	36		92
Net effect of changes in current and other assets and current liabilities	(7,036)		(1,916)
Net cash provided by operating activities	5,538		15,011
Cash flows from investing activities
Acquisition of property, equipment and leasehold improvements	(10,520)		(3,127)
Acquisition of noncontrolling interest in consolidated subsidiary	0		2,370
Investment in joint venture	0		2,000
Payment of holdback related to Si En acquisition	(4,200)		0
Proceeds from sale of investments	4,655		0
Increase in restricted cash	0		224
Purchases of available-for-sale securities	(4,330)		(982)
Proceeds from sales of available-for-sale securities	4,458		1,304
Cash used in investing activities	(9,937)		(7,399)
Cash flows from financing activities
Repurchases and retirement of common stock	(547)		(464)
Proceeds from issuance of common stock	2,151		4,028
Proceeds from borrowings	4,875		0
Principal payments of long-term obligations	(49)		0
Proceeds from borrowings under short-term lines of credit	3,393		7,732
Principal payments of short-term lines of credit	(3,393)		(7,732)
Cash provided by financing activities	6,430		3,564
Effect of exchange rate changes on cash and cash equivalents	(476)		345
Net increase in cash and cash equivalents	1,555		11,521
Cash and cash equivalents at beginning of period	75,497	[1]	83,863
Cash and cash equivalents at end of period	$ 77,052		$ 95,384

[1] Derived from audited financial statements.