Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015
Revenue:
Total revenue	$ 73,721	$ 62,060	$ 84,867
Cost of revenue:
Total cost of revenue	94,404	81,423	96,067
Gross profit (loss)	(20,683)	(19,363)	(11,200)
Operating expenses:
Selling, general and administrative	20,238	21,533	22,671
Research and development	13,782	13,851	14,694
Goodwill impairment			1,843
Bad debt expense (recovery)	(380)	763	2,147
Total operating expenses	33,640	36,147	41,355
Loss from operations	(54,323)	(55,510)	(52,555)
Other income:
Interest expense	(39)	(26)	(229)
Interest income	653	376	427
Foreign exchange gains (losses)	(339)	(113)	2,622
Other, net	(60)	(60)	(99)
Total other income, net	215	177	2,721
Loss before income taxes	(54,108)	(55,333)	(49,834)
Income tax expense (benefit)	2,683	(9,363)	(17,193)
Net loss	$ (56,791)	$ (45,970)	$ (32,641)
Loss per common share:
Basic	$ (4.32)	$ (3.52)	$ (2.51)
Diluted	$ (4.32)	$ (3.52)	$ (2.51)
Weighted average common shares outstanding:
Basic	13,134,071	13,044,875	12,996,958
Diluted	13,134,071	13,044,875	12,996,958
Products
Revenue:
Total revenue	$ 60,055	$ 46,530	$ 73,691
Cost of revenue:
Total cost of revenue	79,548	63,608	79,998
Rental equipment
Revenue:
Total revenue	13,666	15,530	11,176
Cost of revenue:
Total cost of revenue	$ 14,856	$ 17,815	$ 16,069