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Note 11 - Segment Information - Segment Data (Details) - USD ($) | 3 Months Ended
--- | ---
Jun. 30, 2017 | Jun. 30, 2016
Revenues | $ 47,697,373 | $ 30,493,253
Operating Income (Loss) | 2,212,568 | (7,073,482)
Capital Expenditures | 489,995 | 519,569
Depreciation and Amortization | 398,827 | 605,081
Corporate, Non-Segment [Member] |  |
Revenues | 290,532 | 281,926
Operating Income (Loss) | (869,916) | (931,837)
Capital Expenditures | 459,653 | 388,635
Depreciation and Amortization | 59,347 | 30,743
Intersegment Eliminations [Member] |  |
Revenues | (291,532) | (3,348,426)
Operating Income (Loss) | 1,326 | (524,989)
Capital Expenditures |  | (3,066,500)
Depreciation and Amortization | (1,326) | (14,351)
Overnight Air Cargo [Member] |  |
Revenues | 16,742,175 | 16,637,165
Overnight Air Cargo [Member] | Operating Segments [Member] |  |
Revenues | 16,742,175 | 16,637,165
Operating Income (Loss) | 816,666 | 979,177
Capital Expenditures |  |
Depreciation and Amortization | 31,016 | 29,209
Ground Equipment Sales [Member] |  |
Revenues | 5,949,656 | 4,254,188
Ground Equipment Sales [Member] | Operating Segments [Member] |  |
Revenues | 5,949,656 | 6,670,688
Operating Income (Loss) | 165,794 | 342,320
Capital Expenditures |  | 19,596
Depreciation and Amortization | 132,880 | 47,594
Ground Equipment Sales [Member] | Operating Segments [Member] | Domestic [Member] |  |
Revenues | 5,276,366 | 5,386,069
Ground Equipment Sales [Member] | Operating Segments [Member] | International [Member] |  |
Revenues | 673,290 | 1,284,619
Ground Support Services [Member] |  |
Revenues | 9,113,073 | 6,800,042
Ground Support Services [Member] | Operating Segments [Member] |  |
Revenues | 9,113,073 | 6,800,042
Operating Income (Loss) | 356,824 | (110,052)
Capital Expenditures | 25,365 | 101,411
Depreciation and Amortization | 111,631 | 83,436
Printing Equipment and Maintenance [Member] |  |
Revenues | 3,131,381 | 2,560,088
Printing Equipment and Maintenance [Member] | Operating Segments [Member] |  |
Revenues | 3,131,381 | 3,210,088
Operating Income (Loss) | 924,036 | (6,935,359)
Capital Expenditures |  | 9,927
Depreciation and Amortization | 4,691 | 296,081
Printing Equipment and Maintenance [Member] | Operating Segments [Member] | Domestic [Member] |  |
Revenues | 1,443,982 | 2,232,706
Printing Equipment and Maintenance [Member] | Operating Segments [Member] | International [Member] |  |
Revenues | 1,687,399 | 977,382
Commercial Jet Engines [Member] | Operating Segments [Member] |  |
Revenues | 12,726,341 |
Operating Income (Loss) | 810,940 |
Capital Expenditures | 4,977 |
Depreciation and Amortization | 45,776 |
Commercial Jet Engines [Member] | Operating Segments [Member] | Domestic [Member] |  |
Revenues | 8,190,885 |
Commercial Jet Engines [Member] | Operating Segments [Member] | International [Member] |  |
Revenues | 4,535,456 |
Leasing [Member] |  |
Revenues | 35,747 | 241,770
Leasing [Member] | Operating Segments [Member] |  |
Revenues | 35,747 | 241,770
Operating Income (Loss) | 6,898 | 107,258
Capital Expenditures |  | 3,066,500
Depreciation and Amortization | $ 14,812 | $ 132,369

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- Definition The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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