Statement of Financial Position (Parentheticals) (USD $)	Jun. 30, 2011	Mar. 31, 2011
Current assets:
Allowance For Doubtful Accounts Receivable Current	$ 3,447,000	$ 3,478,000
Stockholders equity:
Preferred Stock Par Or Stated Value Per Share	$ 0.01	$ 0.01
Preferred Stock Shares Authorized	5,000,000	5,000,000
Preferred Stock Shares Issued	0	0
Preferred Stock Shares Outstanding	0	0
Common Stock Par Or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock Shares Authorized	80,000,000	80,000,000
Common Stock Shares Issued	37,538,247	37,352,509
Common Stock Shares Outstanding	31,521,092	31,452,922