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DETAILS OF CERTAIN BALANCE SHEET ACCOUNTS Inventory, net (Tables)
 3 Months Ended
Jun. 30, 2011
Balance Sheet Related Disclosures [Abstract]  
Inventory, net [Table Text Block]
Inventory, net:
 
 
June 30,
 
March 31,
(in thousands)
 
2011
 
2011
Raw materials
 
$
16,659


 
$
15,315


Work in process
 
2,871


 
2,558


Finished goods
 
38,167


 
38,600


Inventory, net
 
$
57,697


 
$
56,473