Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2020	Mar. 31, 2020
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 2,709	$ 3,636
Common stock, par value (in usd per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	61,227,000	60,098,000
Common stock, shares outstanding (in shares)	60,967,000	59,838,000
Treasury stock, shares (in shares)	260,000	260,000