Changes in Stockholders' Equity

6 Months Ended

Jun. 30, 2024

Changes in Stockholders' Equity

Changes in Stockholders' Equity

(3) Changes in Stockholders’ Equity

Three and Six Months Ended June 30, 2024 (in thousands):

						Accumulated
				Additional		Other				Total
	Common Stock			Paid-In		Comprehensive		Accumulated		Stockholders’
	Shares	Amount		Capital		Income		Deficit		Equity
Balance, March 31,  2024	165,311	$	16	$	489,955	$	138	$	(374,532)	$	115,577
Issuance of common stock upon exercise of stock options	31		—		8		—		—		8
Issuance of common stock upon release of RSUs	1,478		—		—		—		—		—
Proceeds from sale of common stock through At-The-Market (ATM) Offering	12,777		1		15,801		—		—		15,802
Capitalization of deferred costs to equity upon share issuance	—		—		(80)		—		—		(80)
Stock-based compensation	—		—		3,287		—		—		3,287
Foreign currency translation loss	—		—		—		(17)		—		(17)
Change in unrealized loss on available-for-sale securities	—		—		—		2		—		2
Net loss	—		—		—		—		(12,421)		(12,421)
Balance, June 30, 2024	179,597	$	17	$	508,971	$	123	$	(386,953)	$	122,158

						Accumulated
				Additional		Other				Total
	Common Stock			Paid-In		Comprehensive		Accumulated		Stockholders’
	Shares	Amount		Capital		Income		Deficit		Equity
Balance, December 31, 2023	147,066	$	14	$	463,089	$	244	$	(353,759)	$	109,588
Issuance of common stock upon exercise of stock options	250		—		68		—		—		68
Issuance of common stock upon release of RSUs	2,801		—		—		—		—		—
Proceeds from sale of common stock through Purchase Agreement - B. Riley	10,057		1		12,837		—		—		12,838
Proceeds from sale of common stock through At-The-Market (ATM) Offering	19,423		2		26,831		—		—		26,833
Capitalization of deferred costs to equity upon share issuance	—		—		(132)		—		—		(132)
Stock-based compensation	—		—		6,278		—		—		6,278
Foreign currency translation loss	—		—		—		(105)		—		(105)
Change in unrealized loss on available-for-sale securities	—		—		—		(16)		—		(16)
Net loss	—		—		—		—		(33,194)		(33,194)
Balance, June 30, 2024	179,597	$	17	$	508,971	$	123	$	(386,953)	$	122,158

Three and Six Months Ended June 30, 2023 (in thousands):

						Accumulated
				Additional		Other				Total
	Common Stock			Paid-In		Comprehensive		Accumulated		Stockholders’
	Shares	Amount		Capital		Income (loss)		Deficit		Equity
Balance, March 31, 2023	129,171	$	12	$	431,466	$	(6)	$	(302,006)	$	129,466
Issuance of common stock upon exercise of stock options	564		—		152		—		—		152
Issuance of common stock upon exercise of common stock warrants	16		—		—		—		—		—
Issuance of common stock upon release of RSUs	781		—		—		—		—		—
Proceeds from sale of common stock through Purchase Agreement - B. Riley	1,869		1		2,347		—		—		2,348
Stock-based compensation	—		—		3,355		—		—		3,355
Foreign currency translation gain	—		—		—		4		—		4
Change in unrealized loss on available-for-sale securities	—		—		—		3		—		3
Net loss	—		—		—		—		(16,966)		(16,966)
Balance, June 30, 2023	132,401	$	13	$	437,320	$	1	$	(318,972)	$	118,362

						Accumulated
				Additional		Other				Total
	Common Stock			Paid-In		Comprehensive		Accumulated		Stockholders’
	Shares	Amount		Capital		Income (loss)		Deficit		Equity
Balance, December 31, 2022	125,257	$	12	$	429,025	$	(161)	$	(278,652)	$	150,224
Issuance of common stock upon exercise of stock options	3,424		—		902		—		—		902
Issuance of common stock upon exercise of common stock warrants	143		—		1		—		—		1
Issuance of common stock upon release of RSUs	1,708		—		—		—		—		—
Proceeds from sale of common stock through Purchase Agreement - B. Riley	1,869		1		2,347		—		—		2,348
Capitalization of deferred costs to equity upon share issuance	—		—		(13)		—		—		(13)
Stock-based compensation	—		—		5,058		—		—		5,058
Foreign currency translation loss	—		—		—		(79)		—		(79)
Change in unrealized loss on available-for-sale securities	—		—		—		241		—		241
Net loss	—		—		—		—		(40,320)		(40,320)
Balance, June 30, 2023	132,401	$	13	$	437,320	$	1	$	(318,972)	$	118,362