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Note 7 - Inventories (Tables) | 6 Months Ended
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Sep. 30, 2016
Notes Tables |
Schedule of Inventory, Current [Table Text Block] |
|  | September 30, 2016 |  |  | March 31, 2016 |
Ground support service parts |  | $ | 2,282,627 |  |  | $ | 1,566,694 |
Ground equipment manufacturing: |  |  |  |  |  |  |  |
Raw materials |  |  | 2,397,974 |  |  |  | 1,549,810 |
Work in process |  |  | 1,002,710 |  |  |  | 408,213 |
Finished goods |  |  | 7,723,641 |  |  |  | 4,328,812 |
Printing equipment and maintenance |  |  |  |  |  |  |  |
Raw materials |  |  | 3,219,663 |  |  |  | 3,319,939 |
Work in process |  |  | 798,031 |  |  |  | 759,446 |
Finished goods |  |  | 901,769 |  |  |  | 562,912 |
Commercial jet engines |  |  | 2,003,484 |  |  |  | - |
Total inventories |  |  | 20,329,899 |  |  |  | 12,495,826 |
Reserves |  |  | (2,662,498 | ) |  |  | (221,722 | )
Total, net of reserves |  | $ | 17,667,401 |  |  | $ | 12,274,104 |

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