Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2012	Mar. 31, 2011
Consolidated Balance Sheets [Abstract]
Allowance for doubtful debt, accounts receivable	$ 2,395,000	$ 2,588,000
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	120,000,000	60,000,000
Common stock, shares issued	26,261,874	26,122,084
Common stock, shares outstanding	11,308,773	11,630,921
Treasury, stock, shares	14,953,101	14,491,163