Note 9 - Inventories (Tables)

3 Months Ended

Jun. 30, 2018

Notes Tables

Schedule of Inventory, Current [Table Text Block]

	June 30, 2018		March 31, 2018
Ground support service parts	$	2,590,319	$	2,489,433
Ground equipment manufacturing:
Raw materials		2,856,870		3,198,939
Work in process		1,828,715		20,089
Finished goods		4,244,487		1,768,897
Printing equipment and maintenance
Raw materials		851,938		747,778
Finished goods		395,044		553,847
Commercial jet engines and parts		14,852,478		25,452,022
Total inventories	$	27,619,851	$	34,231,005