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:
Net (loss) income	$ (7,486)	$ 14,523
Adjustments to reconcile net (loss) income to net cash used in operating activities:
Depreciation, amortization, and accretion expense	4,163	4,062
Stock-based compensation expense	2,239	2,133
Gain on sale of an investment	(307)	0
Provision adjustments related to doubtful accounts	361	15
Provision adjustments related to product warranty	1,562	2,401
Change in fair value of financial instruments	71	30
Non-cash insurance proceeds	0	(19,000)
Total non-cash adjustments	8,089	(10,359)
Changes in operating assets and liabilities:
Accounts receivable	4,003	(2,628)
Inventory	3,526	(600)
Other assets	2,496	2,448
Accounts payable	(630)	(9,176)
Accrued expenses and other current liabilities	(2,698)	(4,406)
Total change in operating assets and liabilities	6,697	(14,362)
Net cash provided by (used in) operating activities	7,300	(10,198)
Cash flows from investing activities:
Cash proceeds from sale of investment	307	0
Purchase of equipment	(1,039)	(4,961)
Deposits on equipment orders	0	(3)
Increase in restricted cash	(1,178)	(248)
Proceeds from disposal of property, plant and equipment	0	396
Net cash used in investing activities	(1,910)	(4,816)
Cash flows from financing activities:
Net (payments) proceeds from borrowings from credit facilities	(4,106)	1,463
Proceeds from sale of common stock	0	9,475
Proceeds from stock plans	659	1,006
Net cash (used in) provided by financing activities	(3,447)	11,944
Effect of exchange rate changes on foreign currency	128	(55)
Net increase in cash and cash equivalents	2,071	(3,125)
Cash and cash equivalents at beginning of period	16,104	9,047
Cash and cash equivalents at end of period	18,175	5,922
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash paid during the period for interest	272	370
Cash paid during the period for income taxes	4	15
NON-CASH INVESTING AND FINANCING ACTIVITIES
Forgiveness of capital lease and accounts payable	0	10,761
Note Receivable from contract manufacturer	$ 0	$ 8,239