Income Taxes (Tables)

12 Months Ended

Jan. 31, 2019

Income Tax Disclosure [Abstract]

Reconciliation of Income Tax Benefit

Income tax benefit differed from the amount computed by applying the federal blended statutory income tax rate of 21% to pretax loss as a result of the following (in thousands):

	Fiscal Year Ended January 31,
	2019			Rate			2018			Rate			2017			Rate
Federal tax at statutory rate	$	(3,141	)		21	%	$	(4,316	)		33	%	$	(4,403	)		34	%
Impact of U.S. tax law change		58			—			11,667			(89	)%		—			—
Change in valuation allowance		5,603			(37	)%		(6,786	)		52	%		4,881			(38	)%
Research and development credit		(2,155	)		14	%		(1,080	)		8	%		(738	)		6	%
State taxes		(494	)		3	%		(396	)		3	%		(230	)		2	%
Stock-based compensation		(991	)		7	%		387			(3	)%		387			(3	)%
Permanent tax adjustment		843			(6	)%		527			(4	)%		103			(1	)%
Impact of foreign operations		(105	)		1	%		—			—			—			—
Other		(2	)		—			—			—			—			—
Total	$	(384	)		(3	)%	$	3			0	%	$	—			0	%

Schedule of Deferred Tax Assets and Liabilities

The tax effects of temporary differences that give rise to significant portions of the Company’s deferred tax assets and liabilities related to the following (in thousands):

	As of January 31,
	2019			2018
Deferred tax assets:
Accruals and reserves	$	1,549		$	2,281
Stock-based compensation		1,071			1,030
Intangible assets amortization		(21	)		61
Deferred revenue		73			125
Net operating loss carry forwards		26,277			22,047
Tax credit carryover		5,977			3,810
Gross deferred tax assets		34,926			29,354
Valuation allowance		(34,309	)		(28,657	)
Net deferred tax assets	$	617		$	697
Deferred tax liabilities:
Acquired intangible assets	$	(607	)	$	(313	)
Fixed assets depreciation		(154	)		(384	)
Gross deferred tax liabilities	$	(761	)	$	(697	)
Total deferred tax liabilities	$	(144	)	$	—

Summary of Activity Related to UTBs

The following table summarizes the activity related to UTBs (in thousands):

Balance at January 31, 2017	$	1,815
Increase related to prior year positions		139
Increase related to current year tax positions		871
Balance at January 31, 2018		2,825
Increase related to prior year positions		8
Increase related to current year tax positions		1,592
Balance at January 31, 2019	$	4,425