Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Apr. 30, 2017	Jan. 31, 2017
Statement of Financial Position [Abstract]
Accounts receivable, net of allowance for doubtful accounts	$ 3,720	$ 3,716
Long-term receivables, net of allowance for doubtful accounts	$ 2,188	$ 2,188
Preferred stock, par value	$ 1.00	$ 1.00
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	348,000	343,000
Preferred stock, shares outstanding	348,000	343,000
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	20,000,000	20,000,000
Common stock, shares issued	14,019,000	14,019,000
Treasury stock, shares	1,929,000	1,929,000