Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2021	Mar. 31, 2021
Allowance for expected credit losses	$ 1,002	$ 1,220
Common stock, stated value	$ 0.30	$ 0.30
Common stock, shares authorized	80,000,000	80,000,000
Common stock, shares issued	31,606,831	31,606,831
Common stock, shares outstanding	24,568,661	24,010,727
Treasury shares	7,038,170	7,596,104
Series A Convertible Preferred Stock [Member]
Preferred Stock, No Par Value