6. Income Taxes (Tables)

12 Months Ended

Apr. 30, 2019

Income Tax Disclosure [Abstract]

Provision for income taxes

	2019			2018			2017
Federal income taxes at statutory rate	$	(1,120	)	$	(6,112	)	$	475
State income taxes		(48	)		155			309
Expiration and adjustments of deferred tax assets		2,507			1,840			1,693
Change in valuation allowance		(2,480	)		(57,599	)		(2,616	)
Stock-based compensation		1,309			1,584			–
Other, net		(452	)		6			139
Tax Cuts and Jobs Act		–			60,126			–
Income tax benefit	$	(284	)	$	–		$	–

Deferred income taxes

	2019			2018
Net operating losses	$	113,612		$	115,236
Stock-based compensation		3,416			4,828
Deferred revenue		1,610			2,852
Deferred rent		555			568
Other		1,256			879
Total deferred tax assets		120,449			124,363
Less valuation allowance		(119,516	)		(123,555	)
Total deferred tax assets, net of valuation allowance	$	933		$	808
Deferred tax liabilities:
Fixed assets		(933	)		(808	)
Total deferred tax liabilities		(933	)		(808	)
Net deferred tax assets	$	–		$	–