Net Loss Per Share

6 Months Ended

Jun. 30, 2023

Earnings Per Share [Abstract]

Net Loss Per Share

10. Net Loss Per Share

	Three months ended June 30,						Six months ended June 30,
	2023			2022			2023			2022
	(in thousands, except shares and per share data)						(in thousands, except shares and per share data)
Net loss	$	(2,614	)	$	(1,345	)	$	(5,504	)	$	(3,522	)
Preferred stock dividends		3			(18	)		(77	)		(18	)
Net loss attributable to common stockholders	$	(2,611	)	$	(1,363	)	$	(5,581	)	$	(3,540	)
Basic and diluted weighted average common shares outstanding		13,785,657			11,230,525			13,000,211			10,996,996
Basic and diluted net loss per share attributable to common stockholders	$	(0.19	)	$	(0.12	)	$	(0.43	)	$	(0.32	)

The following potential common shares were excluded from the calculation of diluted net loss per share attributable to common stockholders for the six months ended June 30, 2023 and 2022 because including them would have had an anti-dilutive effect:

	Six months ended June 30,
	2023		2022
Options to purchase common stock		3,786,900		2,402,603
Warrants to purchase common stock		1,113,622		1,888,622
Series E convertible preferred stock		—		686,680
Total		4,900,522		4,977,905