Note 10 - Business Combinations (Details Textual) - USD ($)				12 Months Ended
	May 04, 2018	Dec. 15, 2017	May 02, 2017	Mar. 31, 2019	Mar. 31, 2018
Deferred Income Tax Expense (Benefit), Total				$ (1,158,945)	$ (10,566)
Business Combination, Bargain Purchase, Gain Recognized, Amount, Net				$ 1,983,777	$ 501,880
Chief Investment Officer [Member]
Annual Salary After the Acquisition		$ 50,000
Worthington Aviation Parts, Inc [Member]
Payments to Acquire Businesses, Gross	$ 3,300,000
Deferred Income Tax Expense (Benefit), Total	589,000
Business Combination, Bargain Purchase, Gain Recognized, Amount, Net	1,984,000
Payment for Earnest Money Deposit	50,000
Business Combination, Acquisition Related Costs	83,000
Business Combination, Consideration Transferred, Total	$ 3,325,699
Blue Clay Capital Management, LLC [Member]
Business Combination, Consideration Transferred, Total		$ 1
Business Combination, Conversion Agreement, Aggregate Capital Accounts of Each Fund, Percent		1.00%
Business Combination, Conversion Agreement, Aggregate Capital Accounts of Each Fund, Amount		$ 100,000
Business Combination, Fair Value Amount for Each General Partnership Interest		227,000
Blue Clay Capital Management, LLC [Member] | BCCP LO [Member]
Business Combination, Conversion Agreement, Aggregate Capital Accounts of Each Fund, Amount		10,000
Blue Clay Capital Management, LLC [Member] | Chief Investment Officer [Member]
Annual Salary After the Acquisition		50,000
Blue Clay Capital Management, LLC [Member] | Chief Operating Officer and Chief Financial Officer [Member]
Annual Salary After the Acquisition		$ 125,000
AirCo [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, Gross			$ 2,400,000
Deferred Income Tax Expense (Benefit), Total			278,000
Business Combination, Bargain Purchase, Gain Recognized, Amount, Net			$ 502,000