CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities:
Net loss	$ (23,208)	$ (22,007)
Adjustments to reconcile net loss to net cash provided by operating activities:
Deferred income tax expense (benefit)	(14)	2,786
Rental equipment depreciation	6,905	7,651
Property, plant and equipment depreciation	2,596	2,684
Accretion of discounts on short-term investments	30	70
Stock-based compensation expense	2,844	2,660
Bad debt recovery	(418)	(623)
Inventory obsolescence expense	8,397	4,818
Gross (profit) loss from sale of used rental equipment	(1,531)	60
Realized loss on short-term investments	2	3
Excess tax expense from stock-based compensation		(1,390)
Effects of changes in operating assets and liabilities:
Trade accounts and notes receivable	244	4,599
Income tax receivable	12,831	9,918
Inventories	1,176	2,212
Prepaid expenses and other current assets	39	(2,608)
Prepaid income taxes	778	712
Accounts payable trade	(12)	(2,567)
Accrued expenses and other	(2,251)	(4,534)
Deferred revenue	(11)	(110)
Income tax payable	(117)	73
Net cash provided by operating activities	8,280	4,407
Cash flows from investing activities:
Purchase of property, plant and equipment	(343)	(822)
Investment in rental equipment	(140)	(468)
Proceeds from the sale of used rental equipment	2,439	197
Purchases of short-term investments	(5,251)	(5,602)
Proceeds from the sale of short-term investments	3,814	8,753
Net cash provided by investing activities	519	2,058
Cash flows from financing activities:
Proceeds from the exercise of stock options	50
Net cash provided by financing activities	50
Effect of exchange rate changes on cash	196	(341)
Increase in cash and cash equivalents	9,045	6,124
Cash and cash equivalents, beginning of fiscal year	10,262	22,314
Cash and cash equivalents, end of fiscal period	$ 19,307	$ 28,438