Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) shares in Thousands	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Revenue	$ 33,426,000	$ 25,482,000
Cost of revenue	20,854,000	18,008,000
Gross profit	12,572,000	7,474,000
Operating expense:
Selling, general, and administrative	5,798,000	5,887,000
Research and development	4,296,000	4,642,000
Gain on sale of assets	(29,000)	(1,602,000)
Total operating expense	10,065,000	8,927,000
Operating income (loss)	2,507,000	(1,453,000)
Other income:
Interest expense, net	(49,000)	(15,000)
Foreign exchange gain	237,000	147,000
Total other income	188,000	132,000
Income (loss) before income tax expense	2,695,000	(1,321,000)
Income tax expense	(126,000)	(14,000)
Net income (loss)	2,569,000	(1,335,000)
Foreign exchange translation adjustment	(10,000)	(36,000)
Comprehensive income (loss)	$ 2,559,000	$ (1,371,000)
Per share data:
Net income (loss) per basic share	$ 0.09	$ (0.05)
Weighted-average number of basic shares outstanding	29,503	28,832
Net income (loss) per diluted share	$ 0.08	$ (0.05)
Weighted-average number of diluted shares outstanding	30,377	28,832