BUSINESS SEGMENT INFORMATION (Details 3) (USD $)	12 Months Ended
	Mar. 31, 2013 Customer	Mar. 31, 2012 Customer	Mar. 31, 2011 Customer
Major Customers
Number of major customers	2	1	3
Major customer - one customer
Major Customers
Major customers amount		46,167,000
Major customer - two customer A
Major Customers
Major customers amount	44,850,000
Major customer - two customer B
Major Customers
Major customers amount	30,874,000
Major customer - three customer A
Major Customers
Major customers amount			82,634,000
Major customer - three customer B
Major Customers
Major customers amount			32,316,000
Major customer - three customer C
Major Customers
Major customers amount			31,072,000
Agencies of the U.S. government
Major Customers
Major customers percentage	63.00%	62.00%	65.00%
Number of contracts terminated	0	1	1