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Note 8 - Balance Sheet Details (Tables) | 9 Months Ended
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Sep. 30, 2020
Notes Tables |
Schedule of Inventory, Current [Table Text Block] |
|  | September 30, |  |  | December 31, |
|  | 2020 |  |  | 2019 |
Raw materials |  | $ | 340,275 |  |  | $ | 328,021 |
Work-in-process |  |  | 8,817 |  |  |  | 10,387 |
Finished goods |  |  | 183,860 |  |  |  | 183,616 |
Total |  | $ | 532,952 |  |  | $ | 522,024 |
Property, Plant and Equipment [Table Text Block] |
|  | September 30, |  |  | December 31, |
|  | 2020 |  |  | 2019 |
Land and improvements |  | $ | 17,464 |  |  | $ | 18,252 |
Buildings and improvements |  |  | 194,994 |  |  |  | 177,079 |
Machinery and equipment |  |  | 147,590 |  |  |  | 117,114 |
Dies and tools |  |  | 23,677 |  |  |  | 22,040 |
Vehicles |  |  | 5,258 |  |  |  | 3,955 |
Office equipment and systems |  |  | 104,363 |  |  |  | 99,124 |
Leasehold improvements |  |  | 4,914 |  |  |  | 4,293 |
Construction in progress |  |  | 11,913 |  |  |  | 36,299 |
Gross property and equipment |  |  | 510,173 |  |  |  | 478,156 |
Accumulated depreciation |  |  | (188,813 | ) |  |  | (161,180 | )
Total |  | $ | 321,360 |  |  | $ | 316,976 |

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