BUSINESS SEGMENT INFORMATION (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2013 item	Mar. 31, 2012	Mar. 31, 2011
BUSINESS SEGMENT INFORMATION
Number of operating segments	1
Net Sales and Contract Revenues
Percentage of assets in foreign countries	5.00%
Net Sales and Contract Revenues	$ 186,680	$ 203,552	$ 278,576
Percentage of net sales and contract revenues	100.00%	100.00%	100.00%
Domestic
Net Sales and Contract Revenues
Net Sales and Contract Revenues	123,652	133,441	190,769
Percentage of net sales and contract revenues	66.00%	66.00%	68.00%
International
Net Sales and Contract Revenues
Net Sales and Contract Revenues	$ 63,028	$ 70,111	$ 87,807
Percentage of net sales and contract revenues	34.00%	34.00%	32.00%
Middle East & Africa
Net Sales and Contract Revenues
Percentage of net sales and contract revenues	54.00%	63.00%	84.00%
Americas - Non-US
Net Sales and Contract Revenues
Percentage of net sales and contract revenues	29.00%	20.00%	2.00%
Asia / Pacific
Net Sales and Contract Revenues
Percentage of net sales and contract revenues	13.00%	11.00%	7.00%
Europe
Net Sales and Contract Revenues
Percentage of net sales and contract revenues	4.00%	6.00%	7.00%