Note 1 - Financial Statement Presentation (Details) (USD $)	12 Months Ended			3 Months Ended		9 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2013 Ground Equipment Sales [Member] Operating Expense [Member]	Dec. 31, 2013 Ground Support Services [Member] Operating Expense [Member]	Dec. 31, 2013 Ground Support Services [Member] Operating Expense [Member]
Note 1 - Financial Statement Presentation (Details) [Line Items]
Income (Loss) From Continuing Operations Before Tax, Overstatement	$ 50,000	$ 33,000	$ 68,000
Prior Period Reclassification Adjustment				$ 301,000	$ 301,000	$ 831,000