Provision for Income Taxes (Tables)

12 Months Ended

Apr. 30, 2018

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense (Benefit)

The components of the provision (benefit) for income taxes are as follows (in thousands):

	Year Ended April 30, 2018
	Federal		State		Foreign		Total
Current	$	—	$	3	$	30	$	33
Total	$	—	$	3	$	30	$	33

	Year Ended April 30, 2017
	Federal			State		Foreign		Total
Current	$	(14	)	$	—	$	33	$	19
Total	$	(14	)	$	—	$	33	$	19

Schedule of Effective Income Tax Rate Reconciliation

A reconciliation between the Company’s effective tax rate and the United States statutory tax rate for the years ended April 30, 2018 and 2017 is as follows:

	Year Ended April 30,
	2018		2017
Federal income tax at statutory rate	29.7	%	34.0	%
US vs. foreign tax rate difference	0.1		—
State income tax, net of federal benefit	(0.2	)	3.9
Permanent differences	(2.0	)	(0.2	)
Increase in uncertain tax position	(2.1	)	1.6
Other	2.5		(0.3	)
Change in valuation allowance	498.0		(39.8	)
Changes in tax rates	(528.0	)	0.5
Income tax expense	(2.0	)%	(0.3	)%

Schedule of Deferred Tax Assets and Liabilities

Significant components of the Company’s deferred tax assets and liabilities as of April 30, 2018 and 2017 consist of the following (in thousands):

	As of April 30,
	2018			2017
Accrued liabilities	$	71		$	103
Depreciation and amortization	(58		)	—
State taxes	1			22
Stock-based compensation expense	4,466			6,503
Capitalized research and development costs	43			195
Foreign net operating loss carry-forward	208			214
Net operating loss carry-forward	9,678			14,786
Total deferred tax assets	14,409			21,823
Less: Valuation allowance	(14,409		)	(21,779		)
Net deferred tax asset	$	—		$	44

Schedule of Unrecognized Tax Benefits Roll Forward

The following table indicates the changes to the Company’s uncertain tax positions for the period and years ended April 30, 2018 and 2017 in thousands:

	Year Ended April 30,
	2018		2017
Balance, beginning of the year	$	121	$	165
Addition based on tax positions related to prior years	—		—
Payment made on tax positions related to prior years	—		(84		)
Addition based on tax positions related to current year	30		40
Balance, end of year	$	151	$	121