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Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Mar. 31, 2020
Mar. 31, 2019
Consolidated Balance Sheets    
Trade accounts receivable, allowance for doubtful accounts (in dollars) $ 802 $ 539
Preferred stock, par value (in dollars per share) $ 1.00 $ 1.00
Preferred stock, authorized shares 2,000,000 2,000,000
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 70,000,000 70,000,000
Common stock, issued shares 40,713,000 33,377,000
Common stock, outstanding shares 40,713,000 33,377,000