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Note 3 - Contracts in Progress (Tables) | 12 Months Ended
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Dec. 31, 2017
Notes Tables |
Schedule Of Cost And Estimated Earnings In Excess Of Billings [Table Text Block] |
|  | 2017 |  |  | 2016 |
Costs incurred on contracts in progress |  | $ | 22,079,680 |  |  | $ | 4,678,192 |
Estimated earnings |  |  | 16,499,697 |  |  |  | 10,733,826 |
|  |  | 38,579,377 |  |  |  | 15,412,018 |
Billings to date |  |  | (30,648,666 | ) |  |  | (18,077,839 | )
|  | $ | 7,930,711 |  |  | $ | (2,665,821 | )
|  | 2017 |  |  | 2016 |
Included in accompanying balance sheets |  |  |  |  |  |  |  |
Under the following captions: |  |  |  |  |  |  |  |
Costs and estimated earnings in excess of billings on contracts in progress |  | $ | 8,397,024 |  |  | $ | 2,596,518 |
Billings in excess of costs and estimated earnings on contracts in progress |  | $ | (466,313 | ) |  | $ | (5,262,339 | )

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