Note 1 - Summary of Significant Accounting Policies (Tables)
|
12 Months Ended |
Sep. 30, 2021 |
|---|
| Notes Tables |
|
| Investments Classified by Contractual Maturity Date [Table Text Block] |
| |
|
September 30, 2021 |
|
|
September 30, 2020 |
|
| Less than one year |
|
$ |
10,373,831 |
|
|
$ |
10,582,527 |
|
| 1-5 years |
|
|
36,912,777 |
|
|
|
25,143,000 |
|
| Total |
|
$ |
47,286,608 |
|
|
$ |
35,725,527 |
|
|
| Financing Receivable, Allowance for Credit Loss [Table Text Block] |
| Year Ended |
|
Balance at Beginning of Year |
|
|
Additions (Recoveries) Charged to Costs and Expenses |
|
|
Less Write-offs |
|
|
Balance at End of Year |
|
| September 30, 2021 |
|
$ |
289,085 |
|
|
$ |
(209,612 |
) |
|
$ |
- |
|
|
$ |
79,473 |
|
| September 30, 2020 |
|
$ |
289,085 |
|
|
$ |
- |
|
|
$ |
- |
|
|
$ |
289,085 |
|
|
| Schedule of Inventory, Current [Table Text Block] |
| |
|
September 30, 2021 |
|
|
September 30, 2020 |
|
| |
|
|
|
|
|
|
|
|
| Raw materials |
|
$ |
23,071,833 |
|
|
$ |
12,287,134 |
|
| Work-in-process |
|
|
2,481,890 |
|
|
|
1,033,021 |
|
| Finished goods |
|
|
3,361,576 |
|
|
|
2,048,514 |
|
| Inventories, gross |
|
|
28,915,299 |
|
|
|
15,368,669 |
|
| Inventory reserve |
|
|
(1,390,988 |
) |
|
|
(960,131 |
) |
| Inventories, net |
|
$ |
27,524,311 |
|
|
$ |
14,408,538 |
|
|
| Property, Plant and Equipment [Table Text Block] |
| |
|
September 30, 2021 |
|
|
September 30, 2020 |
|
| |
|
|
|
|
|
|
|
|
| Manufacturing equipment |
|
$ |
9,178,935 |
|
|
$ |
8,171,497 |
|
| Office equipment |
|
|
2,901,385 |
|
|
|
2,478,056 |
|
| Leasehold improvements |
|
|
2,589,777 |
|
|
|
2,576,861 |
|
| Vehicles |
|
|
245,903 |
|
|
|
245,903 |
|
| Construction in progress |
|
|
150,343 |
|
|
|
19,143 |
|
| Property, plant and equipment, gross |
|
|
15,066,343 |
|
|
|
13,491,460 |
|
| Less accumulated depreciation |
|
|
10,068,685 |
|
|
|
8,538,641 |
|
| Property, plant and equipment, net |
|
$ |
4,997,658 |
|
|
$ |
4,952,819 |
|
|
| Schedule of Finite-Lived Intangible Assets [Table Text Block] |
| |
|
September 30, 2021 |
|
| |
|
Years |
|
|
Gross Carrying Amount |
|
|
Accumulated Amortization |
|
|
Net Book Value Amount |
|
| Customer relationships |
|
|
15 |
|
|
$ |
3,742,000 |
|
|
$ |
904,317 |
|
|
$ |
2,837,683 |
|
| Certifications |
|
|
8 |
|
|
|
1,068,000 |
|
|
|
483,937 |
|
|
|
584,063 |
|
| Trademarks |
|
|
8 |
|
|
|
563,000 |
|
|
|
255,109 |
|
|
|
307,891 |
|
| Patents |
|
|
20 |
|
|
|
790,384 |
|
|
|
84,660 |
|
|
|
705,724 |
|
| Other |
|
|
5 |
|
|
|
31,091 |
|
|
|
24,873 |
|
|
|
6,218 |
|
| Software |
|
|
1 |
- |
3 |
|
|
|
1,959,670 |
|
|
|
1,705,098 |
|
|
|
254,572 |
|
| Totals |
|
|
|
|
|
$ |
8,154,145 |
|
|
$ |
3,457,994 |
|
|
$ |
4,696,151 |
|
| |
|
September 30, 2020 |
|
| |
|
Years |
|
|
Gross Carrying Amount |
|
|
Accumulated Amortization |
|
|
Net Book Value Amount |
|
| Customer relationships |
|
|
15 |
|
|
$ |
3,742,000 |
|
|
$ |
654,850 |
|
|
$ |
3,087,150 |
|
| Certifications |
|
|
8 |
|
|
|
1,068,000 |
|
|
|
350,437 |
|
|
|
717,563 |
|
| Trademarks |
|
|
8 |
|
|
|
563,000 |
|
|
|
184,734 |
|
|
|
378,266 |
|
| Patents |
|
|
20 |
|
|
|
689,889 |
|
|
|
56,257 |
|
|
|
633,632 |
|
| Other |
|
|
5 |
|
|
|
31,091 |
|
|
|
18,655 |
|
|
|
12,436 |
|
| Software |
|
|
1 |
- |
3 |
|
|
|
1,695,559 |
|
|
|
1,538,390 |
|
|
|
157,169 |
|
| Totals |
|
|
|
|
|
$ |
7,789,539 |
|
|
$ |
2,803,323 |
|
|
$ |
4,986,216 |
|
|
| Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
| |
|
Estimated amortization expense |
|
| FY 2022 |
|
$ |
592,192 |
|
| FY 2023 |
|
|
531,237 |
|
| FY 2024 |
|
|
497,387 |
|
| FY 2025 |
|
|
453,342 |
|
| FY 2026 |
|
|
325,920 |
|
| Total |
|
$ |
2,400,078 |
|
|
| Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
| Year ended September 30, |
|
2021 |
|
|
2020 |
|
| Net income |
|
$ |
20,327,380 |
|
|
$ |
7,293,066 |
|
| Weighted average common shares |
|
|
13,720,699 |
|
|
|
13,643,355 |
|
| Dilutive potential common shares |
|
|
63,594 |
|
|
|
- |
|
| Weighted average dilutive common shares outstanding |
|
|
13,784,293 |
|
|
|
13,643,355 |
|
| Earnings per share: |
|
|
|
|
|
|
|
|
| Basic |
|
$ |
1.48 |
|
|
$ |
0.53 |
|
| Diluted |
|
$ |
1.47 |
|
|
$ |
0.53 |
|
|
| Useful Lives [Member] |
|
| Notes Tables |
|
| Property, Plant and Equipment [Table Text Block] |
| |
Years |
| Equipment |
3 – 7 |
| Leasehold improvements |
7-10 or life of lease |
| Vehicles |
3 |
|