Basic earnings per share (EPS) excludes dilution and is computed by dividing net loss attributable to the Company’s stockholders by the weighted-average shares outstanding during the period. Diluted EPS reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised, resulting in the issuance of shares of common stock that would then share in the earnings or losses of the Company.

In connection with the acquisition of Indi in 2018, the Company recorded contingent consideration (See Note 4 – Fair Value) for amounts contingently payable to Indi's selling shareholders pursuant to the terms of the asset purchase agreement. The contingent consideration arrangement requires additional consideration to be paid by the Company to Indi upon attainment of a three-consecutive month gross margin target of $2.0 million within the seven-year period after the acquisition date. If the gross margin target was met, the Company was required to issue 2,520,108 shares of common stock. The Company met the gross margin target of $2.0 million for three consecutive months during the three months ended June 30, 2021. In August 2021, the Company entered into an amendment of the original agreement in which all parties agreed to forgo the issuance of common stock. As a result of the achievement of the gross margin target, the Company included the 2,520,108 shares of common stock in the calculation of weighted-average shares outstanding used in computing basic and diluted net loss per share from the date the gross margin target was met until the amendment was executed. These shares are not included in the statements of convertible preferred stock and stockholders' equity (deficit) or shares issued and outstanding in the accompanying balance sheets.

Basic and diluted loss per share for the years ended December 31, 2021 and 2020 were (in thousands, except per share amounts):


	Year Ended December 31,
	2021			2020
Numerator
Net loss attributable to common stockholders	$	(43,159	)	$	(31,350	)

Denominator
Weighted-average shares outstanding used in computing net loss per share, basic and diluted		27,365			4,838
Net loss per share, basic and diluted	$	(1.58	)	$	(6.48	)

The potentially dilutive securities as of December 31, 2021 and 2020 primarily represent the shares subject to future issuance under stock options awards, warrants, RSUs, and shares subject to purchase under our employee stock purchase plan and would be subject to the treasury stock method when dilutive the terms of which are described in further detail in Note 12 – Share Based Compensation. The following outstanding common stock equivalents were excluded from diluted net loss attributable to common stockholders for the periods presented because inclusion would be anti-dilutive (in thousands):


	Year Ended December 31,
	2021		2020
Options to purchase common stock		3,251		2,495
Shares committed under ESPP		30		—
Warrants		103		103
Restricted stock units		151		79
Total		3,535		2,677