Summary of Business and Significant Accounting Policies (Tables)

12 Months Ended

Jan. 31, 2014

Activity Related to Allowance for Doubtful Accounts

Activity related to our allowance for doubtful accounts was as follows (in thousands):

Balance, January 31, 2011	$	—
Charges to costs and expenses		300
Write-offs		—
Balance, January 31, 2012		300
Charges to costs and expenses		317
Write-offs		(312	)
Balance, January 31, 2013		305
Charges to costs and expenses		(35	)
Write-offs		35
Balance, January 31, 2014	$	305

Accounts receivable [Member]

Schedule of Certain Risks and Concentrations of Credit Risk

The following customers individually exceeded 10% of total accounts receivable as of the dates shown:

	January 31,
		2014		2013
Customer 1		*		15	%
Customer 2		*		10
Customer 3		10	%	10
Customer 4		*		*

* Does not exceed 10%.

Revenues [Member]

Schedule of Certain Risks and Concentrations of Credit Risk

The following customers individually exceeded 10% of total revenues for the periods shown:

	Fiscal Year Ended January 31,
	2014		2013			2012
Customer 1		*		*			*
Customer 2		*		12	%		12	%
Customer 3		*		11			*
Customer 4		*		*			16

* Does not exceed 10%.