Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities:
Net income (loss)	$ 61,620	$ (10,636)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Depreciation, amortization, and accretion expense	2,346	6,336
Stock-based compensation expense	4,144	3,419
Deferred income taxes	24,080	0
Gain on sale of an investment	0	(307)
Provision adjustments related to doubtful accounts	523	232
Provision adjustments related to product warranty	707	1,851
Change in fair value of financial instruments	(122)	(39)
Gain from change in estimate on ARO obligation	(845)	0
Reclassification of foreign currency translation adjustment	(744)	0
Net loss on disposal of equipment	237	0
Settlement of customer related warranty claim	(442)	0
Total non-cash adjustments	(59,068)	11,492
Changes in operating assets and liabilities:
Accounts receivable	6,828	(1,602)
Inventory	(3,026)	4,016
Other assets	(502)	2,119
Accounts payable	(2,979)	1,539
Accrued expenses and other current liabilities	(4,979)	(3,328)
Total change in operating assets and liabilities	(4,658)	2,744
Net cash (used in) provided by operating activities	(2,106)	3,600
Cash flows from investing activities:
Proceeds from sale of Digital Products Business	16,982	0
Cash proceeds from sale of investment	0	307
Purchase of equipment	(2,239)	(1,739)
Decrease in restricted cash	1,456	9
Proceeds from disposal of property, plant and equipment	50	0
Net cash provided by (used in) investing activities	166,185	(1,423)
Cash flows from financing activities:
Payments on credit facilities	(26,518)	(769)
Repurchases of common stock	(45,618)	0
Proceeds from stock plans	1,362	664
Net cash used in financing activities	(70,774)	(105)
Effect of exchange rate changes on foreign currency	137	(11)
Net increase in cash and cash equivalents	93,442	2,061
Cash and cash equivalents at beginning of period	20,687	16,104
Cash and cash equivalents at end of period	114,129	18,165
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash paid during the period for interest	168	336
Cash paid during the period for income taxes	623	4
Photovoltaics
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Gain on sale of Photovoltaics Business	(86,958)	0
Cash flows from investing activities:
Proceeds from sale of Photovoltaics Business	149,936	0
Digital Products Business
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Gain on sale of Photovoltaics Business	$ (1,994)	$ 0