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Note 3 - Contracts in Progress (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2015
Notes Tables |
Schedule Of Cost And Estimated Earnings In Excess Of Billings [Table Text Block] |
|  | 2015 |  |  | 2014 |
Costs incurred on contracts in progress |  | $ | 7,695,281 |  |  | $ | 4,250,299 |
Estimated earnings |  |  | 7,635,114 |  |  |  | 4,541,377 |
|  |  | 15,330,395 |  |  |  | 8,791,677 |
Billings to date |  |  | (10,695,377 | ) |  |  | (7,621,523 | )
|  | $ | 4,635,018 |  |  | $ | 1,170,154 |
|  | 2015 |  |  | 20 14 |
Included in accompanying balance sheets |  |  |  |  |  |  |  |
Under the following captions: |  |  |  |  |  |  |  |
Costs and estimated earnings in excess of billings on contracts in progress |  | $ | 4,635,018 |  |  | $ | 2,498,662 |
Billings in excess of costs and estimated earnings on contracts in progress |  | $ | --- |  |  | $ | (1,328,508 | )

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