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Note 8 - Balance Sheet Details (Tables) | 9 Months Ended
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Sep. 30, 2021
Notes Tables |
Schedule of Inventory, Current [Table Text Block] |
|  | September 30, |  |  | December 31, |
|  | 2021 |  |  | 2020 |
Raw material |  | $ | 623,592 |  |  | $ | 375,516 |
Work-in-process |  |  | 8,808 |  |  |  | 6,833 |
Finished goods |  |  | 302,548 |  |  |  | 220,968 |
Total |  | $ | 934,948 |  |  | $ | 603,317 |
Property, Plant and Equipment [Table Text Block] |
|  | September 30, |  |  | December 31, |
|  | 2021 |  |  | 2020 |
Land and improvements |  | $ | 22,907 |  |  | $ | 18,363 |
Buildings and improvements |  |  | 230,731 |  |  |  | 198,908 |
Machinery and equipment |  |  | 176,585 |  |  |  | 153,696 |
Dies and tools |  |  | 29,014 |  |  |  | 24,190 |
Vehicles |  |  | 6,977 |  |  |  | 6,037 |
Office equipment and systems |  |  | 121,914 |  |  |  | 107,923 |
Leasehold improvements |  |  | 4,231 |  |  |  | 5,276 |
Construction in progress |  |  | 44,603 |  |  |  | 30,227 |
Gross property and equipment |  |  | 636,962 |  |  |  | 544,620 |
Accumulated depreciation |  |  | (224,256 | ) |  |  | (200,684 | )
Total |  | $ | 412,706 |  |  | $ | 343,936 |

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