Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Mar. 31, 2019	Mar. 31, 2018
Consolidated Balance Sheets
Trade accounts receivable, allowance for doubtful accounts (in dollars)	$ 539	$ 333
Preferred stock, par value (in dollars per share)	$ 1.00	$ 1.00
Preferred stock, authorized shares	2,000	2,000
Preferred stock, issued shares	0	0
Preferred stock, outstanding shares	0	0
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, authorized shares	70,000	70,000
Common stock, issued shares	33,377	33,186
Common stock, outstanding shares	33,377	33,186