The following table presents details of stock-based compensation expense included in each functional line item in the condensed consolidated statements of operations above:

	Three Months Ended April 30,
		2021				2020
	(unaudited, in thousands)
Stock-based compensation:
Cost of revenue	$	323			$	297
Research and development		11,194				9,896
Selling, general and administrative		7,325				5,843
Total stock-based compensation	$	18,842			$	16,036

The difference between GAAP and non-GAAP gross margin was 0.5% and 0.5%, or $0.3 million and $0.3 million, for the three months ended April 30, 2021 and April 30, 2020, respectively. The differences were due to the effect of stock-based compensation.

 

AMBARELLA, INC.
RECONCILIATION OF GAAP TO NON-GAAP DILUTED EARNINGS PER SHARE
(in thousands, except share and per share data)
	Three Months Ended April 30,
		2021				2020
	(unaudited)
GAAP net loss	$	(10,818	)		$	(15,463	)
Non-GAAP adjustments:
Stock-based compensation expense		18,842				16,036
Income tax effect		899				748
Non-GAAP net income	$	8,923			$	1,321
GAAP - diluted weighted average shares		35,940,304				34,080,330
Non-GAAP - diluted weighted average shares		38,081,315				35,174,372
GAAP - diluted net loss per share	$	(0.30	)		$	(0.45	)
Non-GAAP adjustments:
Stock-based compensation expense		0.52				0.47
Income tax effect		0.03				0.02
Effect of Non-GAAP - diluted weighted average shares		(0.02	)			—
Non-GAAP - diluted net income per share	$	0.23			$	0.04

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