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Note 14 - Subsequent Events (Details Textual) | Jul. 18, 2016 USD ($) | Jul. 01, 2016 USD ($) $ / shares shares | Aug. 09, 2016 USD ($) | Jun. 30, 2016 USD ($) $ / shares | Mar. 31, 2016 $ / shares | [1]
--- | --- | --- | --- | --- | --- | ---
Common Stock, Par or Stated Value Per Share | $ / shares |  |  |  | $ 0.25 | $ 0.25
Revolving Credit Facility [Member] |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  | $ 20,000,000 |
Minimum Consolidated Tangible Net Worth |  |  |  | $ 22,000,000 |
Subsequent Event [Member] | Revolving Credit Facility [Member] |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  | $ 25,000,000 |  |
Maximum Amount of Assets the Company and It's Subsidiaries Lease or Hold for Leasing Required by the Financial Covenants for the Credit Agreement |  |  | 5,000,000 |  |
Subsequent Event [Member] | Revolving Credit Facility [Member] | Period of April 01, 2016 to March 31, 2017 [Member] |  |  |  |  |
Minimum Consolidated Tangible Net Worth |  |  | $ 18,000,000 |  |
Percentage of Consolidated Net Income |  |  | 50.00% |  |
Subsequent Event [Member] | Revolving Credit Facility [Member] | Period of July 01, 2016 to September 30, 2016 [Member] |  |  |  |  |
Minimum Asset Coverage Ratio |  |  | 1.25 |  |
Subsequent Event [Member] | Revolving Credit Facility [Member] | Period of January 01, 2017 to March 31, 2017 [Member] |  |  |  |  |
Minimum Asset Coverage Ratio |  |  | 1.5 |  |
Subsequent Event [Member] | Revolving Credit Facility [Member] | Period of April 01, 2016 to June 30, 2016 [Member] |  |  |  |  |
Minimum Asset Coverage Ratio |  |  | 1.25 |  |
Subsequent Event [Member] | Revolving Credit Facility [Member] | Period of October 01, 2016 to December 31, 2016 [Member] |  |  |  |  |
Minimum Asset Coverage Ratio |  |  | 1.5 |  |
Subsequent Event [Member] | Revolving Credit Facility [Member] | BMO Harris Bank N.A. [Member] |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ 12,000,000 |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity, Percentage of Eligible Inventory | 75.00% |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity, Maximum Value of Eligible Inventory Included in Borrowing Base | $ 9,000,000 |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity, Percentage of Outstanding Eligible Accounts Receivable | 80.00% |  |  |  |
Guarantor Obligations, Maximum Exposure, Undiscounted | $ 1,600,000 |  |  |  |
Minimum Debt Service Coverage Ratio | 1.75 |  |  |  |
Maximum Ratio of Total Liabilities to Tangible Net Worth | 2.5 |  |  |  |
Annual Operating Lease Payments Limitation | $ 10,000 |  |  |  |
Subsequent Event [Member] | Revolving Credit Facility [Member] | BMO Harris Bank N.A. [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 2.80% |  |  |  |
Subsequent Event [Member] | Contrail Aviation Support LLC. [Member] | Contrail Aviation Inc. [Member] |  |  |  |  |
Payments to Acquire Businesses, Gross | $ 4,937,500 |  |  |  |
Escrow Deposit | $ 300,000 |  |  |  |
Business combination, Equity Interests in Acquiree, Percentage | 21.00% |  |  |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value High, Per Year | $ 1,500,000 |  |  |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High | 3,000,000 |  |  |  |
Subsequent Event [Member] | Contrail Aviation Support LLC. [Member] | Contrail Aviation Inc. [Member] | EBITDA Range 1 [Member] |  |  |  |  |
Business Combination, Contingent Consideration Arrangement, Earnout Payment | 0 |  |  |  |
Subsequent Event [Member] | Contrail Aviation Support LLC. [Member] | Contrail Aviation Inc. [Member] | EBITDA Range 1 [Member] | Maximum [Member] |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, EBITDA Threshold | 1,500,000 |  |  |  |
Subsequent Event [Member] | Contrail Aviation Support LLC. [Member] | Contrail Aviation Inc. [Member] | EBITDA Range 2 [Member] |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Earnout Payment Calculation, Subtraction | $ 1,500,000 |  |  |  |
Business Combination, Contingent Consideration Arrangement, Earnout Payment Calculation, Multiplier | 2 |  |  |  |
Subsequent Event [Member] | Contrail Aviation Support LLC. [Member] | Contrail Aviation Inc. [Member] | EBITDA Range 2 [Member] | Maximum [Member] |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, EBITDA Threshold | $ 2,000,000 |  |  |  |
Subsequent Event [Member] | Contrail Aviation Support LLC. [Member] | Contrail Aviation Inc. [Member] | EBITDA Range 2 [Member] | Minimum [Member] |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, EBITDA Threshold | 1,500,000 |  |  |  |
Subsequent Event [Member] | Contrail Aviation Support LLC. [Member] | Contrail Aviation Inc. [Member] | EBITDA Range 3 [Member] |  |  |  |  |
Business Combination, Contingent Consideration Arrangement, Earnout Payment | 1,000,000 |  |  |  |
Subsequent Event [Member] | Contrail Aviation Support LLC. [Member] | Contrail Aviation Inc. [Member] | EBITDA Range 3 [Member] | Maximum [Member] |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, EBITDA Threshold | 4,000,000 |  |  |  |
Subsequent Event [Member] | Contrail Aviation Support LLC. [Member] | Contrail Aviation Inc. [Member] | EBITDA Range 3 [Member] | Minimum [Member] |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, EBITDA Threshold | 2,000,000 |  |  |  |
Subsequent Event [Member] | Contrail Aviation Support LLC. [Member] | Contrail Aviation Inc. [Member] | EBITDA Range 4 [Member] |  |  |  |  |
Business Combination, Contingent Consideration Arrangement, Earnout Payment | 1,500,000 |  |  |  |
Subsequent Event [Member] | Contrail Aviation Support LLC. [Member] | Contrail Aviation Inc. [Member] | EBITDA Range 4 [Member] | Minimum [Member] |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, EBITDA Threshold | 4,000,000 |  |  |  |
Subsequent Event [Member] | Contrail Aviation Support LLC. [Member] | Contrail Aviation Inc. [Member] | EBITDA Range 5 [Member] |  |  |  |  |
Business Combination, Contingent Consideration Arrangement, Earnout Payment | 3,000,000 |  |  |  |
Subsequent Event [Member] | Contrail Aviation Support LLC. [Member] | Contrail Aviation Inc. [Member] | EBITDA Range 5 [Member] | Minimum [Member] |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, EBITDA Threshold | $ 15,000,000 |  |  |  |
Subsequent Event [Member] | Biglari Group [Member] | Securities Purchase Agreement [Member] |  |  |  |  |
Treasury Stock, Shares, Acquired | shares |  | 329,738 |  |  |
Common Stock, Par or Stated Value Per Share | $ / shares |  | $ 0.25 |  |  |
Treasury Stock Acquired, Average Cost Per Share | $ / shares |  | $ 24.01 |  |  |
Treasury Stock, Value, Acquired, Cost Method |  | $ 7,917,000 |  |  |
[1] | Derived from audited financial statements

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