Consolidated Balance Sheets (Parenthetical) - USD ($)	Mar. 31, 2022	Mar. 31, 2021
Statement of Financial Position [Abstract]
Allowance for doubtful debts, accounts receivable	$ 2,562,000	$ 3,274,000
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	120,000,000	120,000,000
Common stock, shares issued	54,788,712	54,529,642
Common stock, shares outstanding	17,569,087	17,876,090
Treasury stock, shares	37,219,625	36,653,552