Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jan. 31, 2019	Jan. 31, 2018
Statement of Financial Position [Abstract]
Accounts receivable, net of allowance for doubtful accounts	$ 2,113	$ 3,885
Long-term receivables, net of allowance for doubtful accounts	$ 0	$ 2,282
Preferred stock, par value (in usd per share)	$ 1.00	$ 1.00
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	830,000	532,000
Preferred stock, shares outstanding	830,000	532,000
Common stock, par value (in usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized	20,000,000	20,000,000
Common stock, shares issued	14,049,000	14,019,000
Treasury stock, shares	1,929,000	1,929,000