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v3.20.2

Note 1 - Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Sep. 30, 2020
Notes Tables |
Investments Classified by Contractual Maturity Date [Table Text Block] |
|  |  | September 30, 2020 |  |  |  | September 30, 2019 |
Less than one year |  | $ | 10,582,527 |  |  | $ | 13,524,270 |
1-5 years |  |  | 25,143,000 |  |  |  | 23,902,000 |
Total |  | $ | 35,725,527 |  |  | $ | 37,426,270 |
Financing Receivable, Allowance for Credit Loss [Table Text Block] |
Year Ended |  |  | Balance at Beginning of Year |  |  |  | Additions Charged to Costs and Expenses |  |  |  | Less Write-offs |  |  |  | Balance at End of Year |
September 30, 2020 |  | $ | 289,085 |  |  | $ | - |  |  | $ | - |  |  | $ | 289,085 |
September 30, 2019 |  |  | 79,085 |  |  |  | 210,000 |  |  |  | - |  |  |  | 289,085 |
Schedule of Inventory, Current [Table Text Block] |
|  |  | September 30, 2020 |  |  |  | September 30, 2019 |
Raw materials |  | $ | 12,287,134 |  |  | $ | 8,234,046 |
Work-in-process |  |  | 1,033,021 |  |  |  | 540,962 |
Finished goods |  |  | 2,048,514 |  |  |  | 1,356,720 |
Inventories, gross |  |  | 15,368,669 |  |  |  | 10,131,728 |
Inventory reserve |  |  | (960,131 | ) |  |  | (1,118,748 | )
Inventories, net |  | $ | 14,408,538 |  |  | $ | 9,012,980 |
Property, Plant and Equipment [Table Text Block] |
|  |  | September 30, 2020 |  |  |  | September 30, 2019 |
Manufacturing equipment |  | $ | 8,171,497 |  |  | $ | 7,106,041 |
Office equipment |  |  | 4,281,481 |  |  |  | 3,996,251 |
Leasehold improvements |  |  | 2,576,861 |  |  |  | 2,436,346 |
Vehicles |  |  | 245,903 |  |  |  | 245,903 |
Construction in progress |  |  | 19,143 |  |  |  | 8,921 |
Property, plant and equipment, gross |  |  | 15,294,885 |  |  |  | 13,793,462 |
Less accumulated depreciation |  |  | 10,184,897 |  |  |  | 8,380,221 |
Property, plant and equipment, net |  | $ | 5,109,988 |  |  | $ | 5,413,241 |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
|  | 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 |
Totals |  |  |  |  |  | $ | 6,093,980 |  |  | $ | 1,264,933 |  |  | $ | 4,829,047 |
|  | September 30, 2019
|  | Years |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Book Value Amount
Customer relationships |  |  | 15 |  |  | $ | 3,742,000 |  |  | $ | 405,384 |  |  | $ | 3,336,616 |
Certifications |  |  | 8 |  |  |  | 1,068,000 |  |  |  | 216,937 |  |  |  | 851,063 |
Trademarks |  |  | 8 |  |  |  | 563,000 |  |  |  | 114,359 |  |  |  | 448,641 |
Patents |  |  | 20 |  |  |  | 530,409 |  |  |  | 38,247 |  |  |  | 492,162 |
Other |  |  | 5 |  |  |  | 31,091 |  |  |  | 12,438 |  |  |  | 18,653 |
Totals |  |  |  |  |  | $ | 5,934,500 |  |  | $ | 787,365 |  |  | $ | 5,147,135 |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
Year ended September 30, |  | 2020 |  | 2019
Net income |  | $ | 7,293,066 |  |  | $ | 4,566,156 |
Weighted average common shares |  |  | 13,643,355 |  |  |  | 13,442,871 |
Dilutive potential common shares |  |  | - |  |  |  | 8,343 |
Weighted average dilutive common shares outstanding |  |  | 13,643,355 |  |  |  | 13,451,214 |
Earnings per share: |  |  |  |  |  |  |  |
Basic |  | $ | 0.53 |  |  | $ | 0.34 |
Diluted |  | $ | 0.53 |  |  | $ | 0.34 |
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 |

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