Note 2 - Acquisitions (Details Textual)								1 Months Ended	3 Months Ended		11 Months Ended	12 Months Ended
	Jun. 07, 2017 USD ($)	May 02, 2017 USD ($)	Jan. 06, 2017 USD ($)	Oct. 31, 2016 USD ($)	Oct. 03, 2016 USD ($) a	Jul. 18, 2016 USD ($)	Nov. 24, 2015 USD ($) $ / shares shares	May 31, 2017 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2016 USD ($)	Jul. 26, 2017 USD ($)	Mar. 31, 2017 USD ($)	[1]	Jan. 05, 2017 USD ($)
Deferred Income Tax Expense (Benefit)									$ (501,880)
Business Combination, Bargain Purchase, Gain Recognized, Amount, Net									501,880
Goodwill									$ 4,417,605		$ 4,417,605			$ 4,417,605
SAIC [Member] | TFS Partners [Member]
Payments to Acquire Equity Method Investments	$ 500,000
Equity Method Investment, Ownership Percentage	40.00%
TFS Partners [Member] | Fence Store LLC [Member]
Equity Method Investment, Ownership Percentage	60.00%
Delphax [Member]
Percentage of Consolidated Subsidiaries Dividends Attributable to Parent									67.00%
Percentage of Consolidated Subsidiaries Dividends Attributable to Noncontrolling Interests									33.00%
Net Income (Loss) Attributable to Noncontrolling Interest, Percentage									3.40%	33.00%
Delphax [Member]
Repayments of Long-term Lines of Credit			$ 1,260,000
Line of Credit Facility, Maximum Borrowing Capacity			$ 2,500,000													$ 7,000,000
Line of Credit Facility, Maximum Borrowing Capacity, Percentage of Purchase Orders from Customers			100.00%
Line of Credit Facility, Maximum Borrowing Capacity, Maximum Value of Purchase Orders Included in Borrowing Base			$ 500,000
Line of Credit Facility, Interest Rate at Period End			2.50%
Delphax [Member] | Delphax Canada [Member] | Subsequent Event [Member]
Financing Receivable, Net													$ 1,510,000
Delphax [Member] | Upon Execution of the Amendment [Member]
Line of Credit Facility, Commitment Fee Amount			$ 25,000
Delphax [Member] | Upon Repayment in Full of All Loans Under the Senior Credit Agreement [Member]
Line of Credit Facility, Commitment Fee Amount			$ 50,000
Delphax [Member]
Payments to Acquire Businesses, Gross							$ 1,050,000
Business Combination, Warrants Acquired, Condition Under Which Warrants May Be Exercised for Cash, Number of Times the Aggregate Exercise Price							0.95
Business Combination, Warrants Acquired, Exercise for Cash, Measurement Period							20 days
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt							$ 3,313,317
Business Combination, Acquisition Related Costs												$ 110,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents							$ 586,061
Business Acquisition, Percentage of Voting Interests Acquired							38.00%
Goodwill							$ 375,408
Delphax [Member] | Series B Preferred Stock of Delphax [Member]
Business Combination, Shares Acquired | shares							43,000
Business Combination, Warrants Acquired, Number of Securities Called by Warrants | shares							95,600
Business Combination, Warrants Acquired, Exercise Price Per Share | $ / shares							$ 33.4728
Convertible Preferred Stock, Shares Issued upon Conversion | shares							100
Business Combination,Shares Acquired, Percentage, of the Shares of Acquired Entity's Common Stock That Would Be Outstanding Assuming Conversion							38.00%
Percentage of Preferred Stock Initially Purchasable under Warrant Permitted to Acquire							50.00%
Shares of Preferred Stock Acquired in Connection With the Exercise of the Warrant as a Percentage of the Number of Preferred Shares Initially Purchasable under the Warrant							50.00%
Contrail Aviation Inc. [Member]
Business Combination, Contingent Consideration Arrangement, EBITDA During Earnout Period											2,100,000
Business Combination, Contingent Consideration Arrangement, Earnout Payment Respect Earnout Period											1,000,000
Goodwill						$ 4,227,205
Contrail Aviation Inc. [Member] | Other Noncurrent Liabilities [Member]
Business Combination, Contingent Consideration Arrangement, Earnout Payment						2,900,000
Contrail Aviation Inc. [Member] | Contrail Aviation Support LLC. [Member]
Payments to Acquire Businesses, Gross						$ 4,033,368
Business combination, Equity Interests in Acquiree, Percentage						21.00%
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents						$ 904,000
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
Contrail Aviation Inc. [Member] | Contrail Aviation Support LLC. [Member] | EBITDA Range 1 [Member]
Business Combination, Contingent Consideration Arrangements, EBITDA Threshold						1,500,000
Business Combination, Contingent Consideration Arrangement, Earnout Payment						0
Contrail Aviation Inc. [Member] | Contrail Aviation Support LLC. [Member] | EBITDA Range 1 [Member] | Maximum [Member]
Business Combination, Contingent Consideration Arrangements, EBITDA Threshold						1,500,000
Contrail Aviation Inc. [Member] | Contrail Aviation Support LLC. [Member] | EBITDA Range 2 [Member]
Business Combination, Contingent Consideration Arrangements, EBITDA Threshold						1,500,000
Business Combination, Contingent Consideration Arrangement, Earnout Payment						$ 1,500,000
Business Combination, Contingent Consideration Arrangement, Earnout Payment Calculation, Multiplier						2
Contrail Aviation Inc. [Member] | Contrail Aviation Support LLC. [Member] | EBITDA Range 2 [Member] | Minimum [Member]
Business Combination, Contingent Consideration Arrangements, EBITDA Threshold						$ 1,500,000
Contrail Aviation Inc. [Member] | Contrail Aviation Support LLC. [Member] | EBITDA Range 2 [Member] | Maximum [Member]
Business Combination, Contingent Consideration Arrangements, EBITDA Threshold						2,000,000
Contrail Aviation Inc. [Member] | Contrail Aviation Support LLC. [Member] | EBITDA Range 3 [Member]
Business Combination, Contingent Consideration Arrangement, Earnout Payment						1,000,000
Contrail Aviation Inc. [Member] | Contrail Aviation Support LLC. [Member] | EBITDA Range 3 [Member] | Minimum [Member]
Business Combination, Contingent Consideration Arrangements, EBITDA Threshold						2,000,000
Contrail Aviation Inc. [Member] | Contrail Aviation Support LLC. [Member] | EBITDA Range 3 [Member] | Maximum [Member]
Business Combination, Contingent Consideration Arrangements, EBITDA Threshold						4,000,000
Contrail Aviation Inc. [Member] | Contrail Aviation Support LLC. [Member] | EBITDA Range 4 [Member]
Business Combination, Contingent Consideration Arrangements, EBITDA Threshold						1,500,000
Business Combination, Contingent Consideration Arrangement, Earnout Payment						1,500,000
Contrail Aviation Inc. [Member] | Contrail Aviation Support LLC. [Member] | EBITDA Range 4 [Member] | Minimum [Member]
Business Combination, Contingent Consideration Arrangements, EBITDA Threshold						4,000,000
Contrail Aviation Inc. [Member] | Contrail Aviation Support LLC. [Member] | EBITDA Range 5 [Member]
Business Combination, Contingent Consideration Arrangements, EBITDA Threshold						15,000,000
Business Combination, Contingent Consideration Arrangement, Earnout Payment						3,000,000
Contrail Aviation Inc. [Member] | Contrail Aviation Support LLC. [Member] | EBITDA Range 5 [Member] | Minimum [Member]
Business Combination, Contingent Consideration Arrangements, EBITDA Threshold						$ 15,000,000
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] | AirCo [Member]
Payments to Acquire Businesses, Gross		$ 2,400,000						$ 2,400,000
Deferred Income Tax Expense (Benefit)									$ 278,000
Deferred Tax Liabilities, Net									278,000		$ 278,000
Business Combination, Bargain Purchase, Gain Recognized, Amount, Net									$ 502,000
Jet Yard, LLC [Member]
Business Acquisition, Percentage of Voting Interests Acquired					100.00%
Jet Yard, LLC [Member] | Stratus Aero Partners LLC [Member]
Payments to Acquire Businesses, Gross					$ 15,000
Business Acquisition, Percentage of Voting Interests Acquired					100.00%
Jet Yard, LLC [Member] | Stratus Aero Partners LLC [Member] | Lease Contract with Pinal Country, Arizona [Member]
Area of Total Facility | a					48.5
Lessee, Operating Lease, Renewal Term					30 years
Area of Lease Facility | a					2.6
Operating Lease, Lessee, Initial Annual Rent, Amount					$ 27,000
Operating Lease, Lessee, Annual Rent, After Annual Increments, Amount					$ 152,000
Operating Lease, Lessee, Annual Rent, Increase Percentage					5.00%
Operating Lease, Lessee, Annual Rent Increase, Incremental Period					3 years
Jet Yard, LLC [Member] | Global Aviation Partners Llc and Global Aviation Service [Member]
Deferred Tax Assets, Net of Valuation Allowance, Current					$ 0
D&D GSE Support, Inc. [Member] | Global Aviation Services, LLC [Member]
Payments to Acquire Businesses, Gross				$ 400,000
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High				100,000
Payments to Acquire Business, Additional Payment After Closing, Amount				100,000
Payments to Acquire Business, Final Payment, Payable				100,000
Payments to Acquire Business, Final Payment, Payable, Monthly Installments, Amount				16,667
Business Combination, Consideration Transferred				700,000
Business Combination, Consideration Transferred, Liabilities Incurred				0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tangible Assets				200,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill				300,000
Goodwill				$ 200,000
Five Year Senior Subordinated Promissory Note [Member] | Delphax [Member]
Debt Instrument, Face Amount							$ 2,500,000
Debt Instrument, Interest Rate, Stated Percentage							8.50%
Delphax 90-Day Senior Subordinated Note [Member] | Delphax [Member]
Debt Instrument, Cancellation, Outstanding Principal Surrendered							$ 500,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt							$ 508,000
Senior Notes [Member] | Delphax Canada [Member]
Debt Instrument, Interest Rate, Stated Percentage			18.00%													10.50%
Line of Credit Facility, Forbearance Fee Amount			$ 141,000

[1] Derived from audited consolidated financial statements