Balance Sheet Parenthetical (USD $) In Thousands, except Share data	Jun. 30, 2011	Mar. 31, 2011
Allowance for doubtful accounts	$ 3,943	$ 3,908
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	40,000,000	40,000,000
Common stock, shares issued	30,427,789	30,397,789
Common stock, shares outstanding	20,758,812	20,728,812
Preferred stock, par value	$ 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