Fair Value Measurements (Tables)

9 Months Ended

Oct. 31, 2015

Fair Value Disclosures [Abstract]

Schedule of available for sale securities measured on a recurring basis (in thousands)

			Fair Value Measurements
As of October 31, 2015:			Using Inputs Considered as
	Fair Value		Level 1		Level 2		Level 3
Short-term investments:
Certificates of deposit	$	480	$	—	$	480	$	—
Commercial paper		1,500		—		1,500		—
Corporate bonds		2,821		—		2,821		—
Municipal bonds		208		—		208		—
Total assets	$	5,009	$	—	$	5,009	$	—

			Fair Value Measurements
As of January 31, 2015:			Using Inputs Considered as
	Fair Value		Level 1		Level 2		Level 3
Short-term investments:
Certificates of deposit	$	4,078	$	—	$	4,078	$	—
Commercial paper		7,384		—		7,384		—
Corporate bonds		1,616		—		1,616		—
Municipal bonds		215		—		215		—
Total current assets		13,293		—		13,293		—
Long-term investments:
Corporate bonds		2,853		—		2,853		—
U.S. Agency securities		1,899		—		1,899		—
Total non-current assets		4,752		—		4,752		—
Total assets	$	18,045	$	—	$	18,045	$	—

Schedule of assets measured at fair value on a non-recurring basis (in thousands)

	Thirty-Nine Weeks Ended		Fiscal Year Ended
Long-Lived Assets Held and Used (in thousands)	October 31, 2015		January 31, 2015
Carrying value	$	219	$	270
Fair value measured using Level 3 inputs	$	37	$	54
Impairment charge	$	182	$	216

Schedule of unobservable inputs

	Range
Unobservable Inputs	Fiscal 2015	Fiscal 2014
Weighted Average Cost of Capital (WACC)	15%	15%
Annual sales growth	0% to 3%	(3%) to 3.5%