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