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Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2021

Accounting Policies [Abstract]

Schedule of Diluted Net Loss Per Common Share

Diluted net loss per common share for the three months ended March 31, 2021 and 2020 was determined as follows (in thousands, except share and per share amounts):

	Three Months Ended March 31,
	2021				2020
Net loss	$	(4,676	)		$	(7,002	)
Dilutive effect of warrant liability		(1,323	)			—
Net loss allocated to common shares	$	(5,999	)		$	(7,002	)
Weighted average common shares outstanding – basic		25,802,700				9,744,577
Dilutive effect of warrant liability		721,220				—
Weighted average common shares outstanding – diluted		26,523,920				9,744,577
Net loss per share – diluted	$	(0.23	)		$	(0.72	)

Summary of Antidilutive Securities Excluded from Computation of Weighted Average Common Stock Outstanding

The following potentially dilutive shares of common stock have not been included in the computation of diluted net loss per share for the three months ended March 31, 2021 and 2020, as the result would be anti-dilutive:

	Three Months Ended March 31,
	2021				2020
Outstanding stock options		1,371,606				768,354
Outstanding restricted stock units		96,974				85,754
Warrants to purchase common stock associated with June 2016 public offering		421,867				421,867
Warrants to purchase common stock associated with March 2018 public offering – Series 2		798,810				798,810
Warrants to purchase common stock associated with December 2019 Public Offering		4,472,205				4,472,205
Warrants to purchase common stock associated with December 2020 Public Offering - Series 2		6,800,000				—
Common stock associated with March 2019 Notes		1,138,200				1,138,200
Warrants to purchase common stock associated with Solar loan agreement		12,243				12,243
Total		15,111,905				7,697,433

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Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
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Tabular disclosure of the effect of income (loss) on an entity's diluted earnings per share.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
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