Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) shares in Thousands	3 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Income Statement [Abstract]
Revenue	$ 25,482,000	$ 24,001,000
Cost of revenue	18,008,000	18,193,000
Gross profit	7,474,000	5,808,000
Operating expense:
Selling, general, and administrative	5,887,000	7,593,000
Research and development	4,642,000	4,019,000
Gain on sale of assets	(1,602,000)	0
Total operating expense	8,927,000	11,612,000
Operating loss	(1,453,000)	(5,804,000)
Other income:
Interest (expense) income, net	(15,000)	267,000
Foreign exchange gain	147,000	14,000
Total other income	132,000	281,000
Loss before income tax expense	(1,321,000)	(5,523,000)
Income tax expense	(14,000)	(15,000)
Net loss	(1,335,000)	(5,538,000)
Foreign exchange translation adjustment	(36,000)	14,000
Comprehensive loss	$ (1,371,000)	$ (5,524,000)
Per share data:
Net loss per basic and diluted share (in dollars per share)	$ (0.05)	$ (0.20)
Weighted-average number of basic and diluted shares outstanding (in shares)	28,832	27,534