Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Revenue:
Products	$ 34,136	$ 45,847
Revenue, Product and Service [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember
Rental equipment	$ 53,699	$ 49,962
Total revenue	87,835	95,809
Cost of revenue:
Products	$ 39,970	$ 46,059
Revenue, Product and Service [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember
Rental equipment	$ 24,433	$ 18,322
Total cost of revenue	64,403	64,381
Gross profit	23,432	31,428
Operating expenses:
Selling, general and administrative	23,068	23,626
Research and development	16,569	15,495
Goodwill impairment	671
Change in estimated fair value of contingent consideration	1,100	(2,115)
Bad debt expense	63	436
Total operating expenses	41,471	37,442
Gain on disposal of property		7,047
Income (loss) from operations	(18,039)	1,033
Other income (expense):
Interest expense	(38)	(99)
Interest income	1,102	1,308
Foreign exchange gains, net	491	241
Other, net	(109)	(212)
Total other income, net	1,446	1,238
Income (loss) before income taxes	(16,593)	2,271
Income tax expense	2,649	2,417
Net loss	$ (19,242)	$ (146)
Loss per common share:
Basic	$ (1.42)	$ (0.01)
Diluted	$ (1.42)	$ (0.01)
Weighted average common shares outstanding:
Basic	13,525,179	13,388,626
Diluted	13,525,179	13,388,626