CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net loss	$ (14,209)	$ (23,208)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Deferred income tax benefit	(40)	(14)
Rental equipment depreciation	4,519	6,905
Property, plant and equipment depreciation	2,105	2,596
Accretion of discounts on short-term investments	24	30
Stock-based compensation expense	1,344	2,844
Bad debt expense (recovery)	356	(418)
Inventory obsolescence expense	3,297	8,397
Gross profit from sale of used rental equipment	(4,187)	(1,531)
Gain on disposal of property, plant and equipment	(25)
Realized loss on short-term investments	1	2
Effects of changes in operating assets and liabilities:
Trade accounts receivable	(2,943)	244
Income tax receivable	(701)	12,831
Inventories	(4,613)	1,176
Prepaid expenses and other current assets	179	39
Prepaid income taxes	49	778
Accounts payable trade	2,320	(12)
Accrued expenses and other	89	(2,251)
Deferred revenue	60	(11)
Income tax payable		(117)
Net cash provided by (used in) operating activities	(12,375)	8,280
Cash flows from investing activities:
Purchase of property, plant and equipment	(495)	(343)
Proceeds from sale of property and equipment	200
Investment in rental equipment	(1,643)	(140)
Proceeds from the sale of used rental equipment	3,904	2,439
Purchases of short-term investments	(3,755)	(5,251)
Proceeds from the sale of short-term investments	13,321	3,814
Net cash provided by investing activities	11,532	519
Cash flows from financing activities:
Proceeds from the exercise of stock options	19	50
Net cash provided by financing activities	19	50
Effect of exchange rate changes on cash	(89)	196
Increase (decrease) in cash and cash equivalents	(913)	9,045
Cash and cash equivalents, beginning of fiscal year	15,092	10,262
Cash and cash equivalents, end of fiscal period	$ 14,179	$ 19,307