CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 1,850,296	$ (3,653,905)	$ 4,568,627
Adjustments to reconcile net income (loss) to net cash (used in) provided by operating activities:
Depreciation and amortization	451,278	436,208	449,189
Share-based compensation expense:
Stock awards	173,492	199,995	191,749
Excess and obsolete inventory cost	98,728		92,829
Deferred income taxes	57	61,852	41
(Increase) decrease in:
Accounts receivable	1,101,356	225,336	1,762,494
Contract asset	(80,182)	554,190	116,850
Inventories	(289,314)	(100,454)	(626,655)
Prepaid expenses and other current assets	(99,393)	288,899	(91,280)
Other non-current assets			(32,967)
Increase (decrease) in:
Accounts payable	(450,719)	208,541	(182,520)
Accrued expenses	(323,972)	(297,016)	(129,871)
Income taxes	3,341	258,931	(153,577)
Contract liability	(327,570)	76,447	100,769
Net cash provided by (used in) operating activities	2,107,398	(1,740,976)	6,065,678
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(81,281)	(2,548,612)	(153,038)
Net cash (used in) investing activities	(81,281)	(2,548,612)	(153,038)
Net increase in cash and cash equivalents	2,026,117	(4,289,588)	5,912,640
Cash and cash equivalents, beginning of year	20,390,713	24,680,301	18,767,661
Cash and cash equivalents, end of year	22,416,830	20,390,713	24,680,301
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash paid for income tax	456	8,456	$ 400,000
Cash received from income tax refund	$ 2,049	265,588
SUPPLEMENTAL DISCLOSURE OF NONCASH INFORMATION
Transfer from unbilled to accounts receivable		$ 926,632