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Note A - Summary Of Significant Accounting Policies (Tables) | 12 Months Ended
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Sep. 30, 2013
Note A - Summary Of Significant Accounting Policies (Tables) [Line Items] |
Investments Classified by Contractual Maturity Date [Table Text Block] |
Less than one year |  | $ | 5,992,000 |
1-3 years |  |  | 6,770,000 |
Total |  | $ | 12,762,000 |
Schedule of Inventory, Current [Table Text Block] |
|  | September 30, 2013 |  |  | September 30, 2012 |
Raw materials |  | $ | 4,110,224 |  |  | $ | 2,300,380 |
Work-in-process |  |  | 494,980 |  |  |  | 336,298 |
Finished goods |  |  | 1,021,560 |  |  |  | 334,936 |
|  | $ | 5,626,764 |  |  | $ | 2,971,614 |
Property, Plant and Equipment [Table Text Block] |
|  | September 30, 2013 |  |  | September 30, 2012 |
Manufacturing Equipment |  | $ | 2,404,797 |  |  | $ | 1,316,768 |
Office Equipment |  |  | 1,862,847 |  |  |  | 1,823,283 |
Leasehold Improvements |  |  | 127,883 |  |  |  | 127,883 |
Vehicles |  |  | 154,945 |  |  |  | 171,742 |
|  |  | 4,550,472 |  |  |  | 3,439,676 |
Less accumulated depreciation |  |  | 2,753,660 |  |  |  | 2,332,208 |
|  | $ | 1,796,812 |  |  | $ | 1,107,468 |
Depreciation expense |  | $ | 475,524 |  |  | $ | 403,927 |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
Year ended September 30, |  | 2013 |  |  | 2012 |
Net income |  | $ | 4,733,844 |  |  | $ | 7,701,194 |
Weighted average common shares |  |  | 12,527,153 |  |  |  | 12,371,371 |
Dilutive potential common shares |  |  | 551,786 |  |  |  | 418,797 |
Weighted average dilutive common shares outstanding |  |  | 13,078,939 |  |  |  | 12,790,168 |
Earnings per share: |  |  |  |  |  |  |  |
Basic |  | $ | 0.38 |  |  | $ | 0.62 |
Diluted |  | $ | 0.36 |  |  | $ | 0.60 |
Useful Lives [Member] |
Note A - Summary Of Significant Accounting Policies (Tables) [Line Items] |
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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