Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Oct. 31, 2018	Jan. 31, 2018
Statement of Financial Position [Abstract]
Allowance for doubtful accounts, current	$ 3,108	$ 3,885
Allowance for doubtful accounts, non-current	$ 532	$ 2,282
Preferred stock, par value (in usd per share)	$ 1	$ 1.00
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000
Preferred stock, shares issued (in shares)	798,000	532,000
Preferred stock, shares outstanding (in shares)	798,000	532,000
Common stock, par value (in usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	20,000,000	20,000,000
Common stock, shares issued (in shares)	14,049,000	14,019,000
Treasury stock, shares (in shares)	1,929,000	1,929,000