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Note 24 - Subsequent Events (Details Textual) |  |  |  |  |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | ---
Aug. 03, 2017 | Aug. 01, 2017 CAD ft² | Jun. 28, 2017 | Jun. 07, 2017 USD ($) | May 05, 2017 USD ($) | May 02, 2017 USD ($) | May 31, 2017 USD ($) | Mar. 31, 2017 USD ($) | Mar. 31, 2016 USD ($)
Payments to Acquire Businesses, Net of Cash Acquired |  |  |  |  |  |  |  | $ 4,573,700 | $ (78,000)
Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  | $ 25,000,000 |
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  |  |  | 2.00% |
Subsequent Event [Member] | Building Lease in Ontario [Member] |  |  |  |  |  |  |  |  |
Area of Real Estate Property | ft² |  | 12,206 |  |  |  |  |  |  |
Operating Lease, Lessee, Initial Annual Rent, Amount | CAD |  | CAD 94,600 |  |  |  |  |  |  |
Operating Lease, Lessee, Annual Rent, After Annual Increments, Amount | CAD |  | CAD 97,000 |  |  |  |  |  |  |
Subsequent Event [Member] | Term Loan [Member] |  |  |  |  |  |  |  |  |
Long-term Debt |  |  |  |  |  | $ 2,400,000 |  |  |
Debt Instrument, Periodic Payment, Principal |  |  |  |  |  | $ 200,000 |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  | 0.25% |  |  |
Subsequent Event [Member] | Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  | $ 25,000,000 |  |  |
Debt Instrument, Interest Rate, Increase (Decrease) |  |  | 0.25% |  |  |  |  |  |
Collateral Pledged, Percentage of Foreign Equity Holdings | 65.00% |  |  |  |  |  |  |  |
Subsequent Event [Member] | Contrail Loan Agreement's, Revolving Line of Credit [Member] |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  | $ 15,000,000 |  |  |  |
Guarantor Obligations, Maximum Exposure, Undiscounted |  |  |  |  | $ 1,600,000 |  |  |  |
Maximum Ratio of Total Liabilities to Tangible Net Worth |  |  |  |  | 2 |  |  |  |
Minimum Debt Service Coverage Ratio |  |  |  |  | 1.1 |  |  |  |
Subsequent Event [Member] | Contrail Loan Agreement's, Revolving Line of Credit [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |
Tangible Net Worth |  |  |  |  | $ 3,500,000 |  |  |  |
Subsequent Event [Member] | Contrail Loan Agreement's, Revolving Line of Credit [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  |  | 3.00% |  |  |  |
AirCo [Member] | Subsequent Event [Member] | Acquired Inventory and Principal Business Assets, and Assumed Specified Liabilities, of Aircraft Instrument and Radio Company, Incorporated, and Aircraft Instrument and Radio Services, Inc. [Member] |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired |  |  |  |  |  |  | $ 2,400,000 |  |
SAIC [Member] | Subsequent Event [Member] | TFS Partners [Member] |  |  |  |  |  |  |  |  |
Payments to Acquire Equity Method Investments |  |  |  | $ 500,000 |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  | 40.00% |  |  |  |  |
TFS Partners [Member] | Subsequent Event [Member] | Fence Store LLC [Member] |  |  |  |  |  |  |  |  |
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest |  |  |  | 60.00% |  |  |  |  |

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- Definition A covenant measure of the physical worth of a company, which does not include any value derived from intangible assets such as copyrights, patents and intellectual property. Tangible net worth is calculated by taking a firm's total assets and subtracting the value of all liabilities and intangible assets. + References No definition available. + Details
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