Condensed Consolidated Balance Sheets (Parenthetical) (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2017	Mar. 31, 2017
Statement of Financial Position [Abstract]
Allowance for Doubtful Accounts Receivable	$ 698	$ 509
Accounts Receivable, Net, Current	$ 14,742	$ 15,598
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	23,318,471	22,942,586
Treasury shares	8,288,360	8,664,245