Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2016
Revenue:
Total revenue	$ 75,748	$ 73,721	$ 62,060
Cost of revenue:
Total cost of revenue	64,776	94,404	81,423
Gross profit (loss)	10,972	(20,683)	(19,363)
Operating expenses:
Selling, general and administrative	19,874	20,238	21,533
Research and development	10,832	13,782	13,851
Bad debt expense (recovery)	1,009	(380)	763
Total operating expenses	31,715	33,640	36,147
Loss from operations	(20,743)	(54,323)	(55,510)
Other income:
Interest expense	(336)	(39)	(26)
Interest income	1,083	653	376
Foreign exchange gains (losses)	324	(339)	(113)
Other, net	(120)	(60)	(60)
Total other income, net	951	215	177
Loss before income taxes	(19,792)	(54,108)	(55,333)
Income tax expense (benefit)	(580)	2,683	(9,363)
Net loss	$ (19,212)	$ (56,791)	$ (45,970)
Loss per common share:
Basic	$ (1.45)	$ (4.32)	$ (3.52)
Diluted	$ (1.45)	$ (4.32)	$ (3.52)
Weighted average common shares outstanding:
Basic	13,250,867	13,134,071	13,044,875
Diluted	13,250,867	13,134,071	13,044,875
Products
Revenue:
Total revenue	$ 53,885	$ 60,055	$ 46,530
Cost of revenue:
Total cost of revenue	52,422	79,548	63,608
Rental equipment
Revenue:
Total revenue	21,863	13,666	15,530
Cost of revenue:
Total cost of revenue	$ 12,354	$ 14,856	$ 17,815