Consolidated Balance Sheets (Parenthetical) - USD ($)	Mar. 31, 2016	Mar. 31, 2015
Statement of Financial Position [Abstract]
Allowance for doubtful debts, accounts receivable	$ 1,821,000	$ 1,645,000
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	120,000,000	120,000,000
Common stock, shares issued	53,448,672	53,243,157
Common stock, shares outstanding	19,562,413	20,250,669
Treasury stock, shares	33,886,259	32,992,488