Income Taxes (Income Tax Expense Reconciliation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Income Tax Disclosure [Abstract]
Statutory	$ 1,607	$ 1,587	$ 285
State taxes (net of federal tax)	363	303	144
Change in valuation allowance	(19,831)	(2,214)	(248)
State rate adjustment	(548)	168	(8)
Change in unrecognized tax benefits	(1)	(3)	(19)
Expirations of attributes	408	229	65
Other	(31)	48	(150)
Income tax expense (benefit)	$ (18,033)	$ 118	$ 69