Income Taxes (Tables)

12 Months Ended

Apr. 30, 2020

Schedule of Components of the Company's Loss Before Income Taxes

The components of the Company’s loss before income taxes for the years ended April 30, 2020, 2019 and 2018 consisted of the following (in thousands):

	2020			2019			2018
Domestic	$	(6,337	)	$	(5,006	)	$	(4,020	)
Foreign		(22,903	)		(15,686	)		(11,785	)
	$	(29,240	)	$	(20,692	)	$	(15,805	)

Schedule of Reconciliation between Effective Tax Rates and Statutory Rates

A reconciliation between the effective tax rates and statutory rates for the years ended April 30, is as follows:

	2020			2019			2018
Income tax benefit at U.S. federal statutory rate		21.0	%		21.0	%		30.4	%
Foreign rate differential		(1.6	)%		(0.9	)%		(4.3	)%
Nondeductible expenses - UK R&D credit		(12.1	)%		(5.9	)%		(16.3	)%
Other		(0.5	)%		(0.9	)%		(4.5	)%
Effect of change in tax rates		—			—			(3.6	)%
Globl Intangible Low-Taxed Income ("GILTI")		—			(7.6	)%		—
Valuation allowance		(6.6	)%		(6.3	)%		(1.7	)%
		0.2	%		(0.6	)%		—

Schedule of Tax Effect of Significant Temporary Differences Representing Deferred Tax Assets and Liabilities

The tax effect of significant temporary differences representing deferred tax assets and liabilities as of April 30, 2020 and 2019 is as follows (in thousands):

	2020			2019
Net operating loss (“NOL”) carryforwards	$	7,367		$	7,424
Other		2,162			968
Valuation allowance		(9,529	)		(8,392	)
Net deferred tax asset	$	—		$	—