Note 2 - Acquisitions (Tables)

9 Months Ended

Dec. 31, 2017

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]

Notes Tables

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]

	May 2, 2017
Assets acquired and liabilities assumed at fair value:
Accounts receivables	$	748,936
Inventories		3,100,000
Property and equipment		26,748
Accounts payable		(313,117	)
Accrued expenses		(382,687	)
Net assets acquired	$	3,179,880
Net assets acquired		3,179,880
Consideration paid		2,400,000
Bargain purchase gain	$	779,880

Contrail Aviation Inc. [Member]

Notes Tables

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]

	July 18, 2016
ASSETS
Accounts receivable	$	1,357,499
Inventories		2,118,475
Prepaid expenses		30,121
Property and equipment		33,095
Intangible assets - non-compete		69,700
Intangible assets - tradename		322,000
Intangible assets - certification		47,000
Intangible assets - customer relationship		451,000
Goodwill		4,227,205
Total assets	$	8,656,095
LIABILITIES
Accounts payable	$	366,575
Accrued expenses		43,652
Earnout liability		2,900,000
Total liabilities	$	3,310,227
Net Assets	$	5,345,868