Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2022

Equity [Abstract]

Schedule of common stock warrants

Common stock warrants

As of September 30, 2022, the Company`s outstanding warrants to purchase shares of common stock, consisted of the following:

Issuance Date	Number of Shares of Common Stock Issuable	Exercise Price		Classification	Expiration Date
May 9, 2017	33,964	$	11.31	Equity	May 8, 2027
July 19, 2019	43,878	$	11.31	Equity	July 18, 2029
	77,842

Schedule of Shares Reserved for Future Issuance

The Company has shares of common stock reserved for future issuances as follows:

	September 30,	December, 31
	2022	2021
Warrants to purchase common stock	77,842	77,842
Common stock options issued and outstanding	2,183,311	2,175,685
Common stock available for future grants	472,104	1,934,095
Restricted stock units issued and outstanding	1,703,213	394,750
Common stock available for ESPP	401,164	401,164

Schedule of Stock Option Activity

A summary of stock option activity is set forth below (in thousands, except share and per share data):

	Number of Shares Underlying Outstanding Options	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value
Outstanding, December 31, 2021	2,175,685	$	9.27	8.7	$	2,856
Options granted	189,800	$	3.27
Options exercised	(56,964)	$	0.61
Options forfeited or cancelled	(125,210)	$	8.71
Outstanding, September 30, 2022	2,183,311	$	9.00	8.1	$	99
Shares exercisable September 30, 2022	1,577,934	$	9.66	7.8	$	81
Vested and expected to vest, September 30, 2022	2,183,311	$	9.00	8.1	$	99

Schedule of Restricted Stock Units Activity

A summary of RSU activity is set forth below (in thousands, except share and per share data): A summary of RSU activity is set forth below (in thousands, except share and per share data):

	Number of Shares Underlying Outstanding Restricted Stock			Weighted Average Grant Date Fair Value
Unvested, January 1, 2022		394,750		$	5.17
Granted		1,485,629		$	2.57
Exercised/released		(88,938	)	$	2.85
Forfeited or cancelled		(88,228	)	$	3.09
Unvested, September 30, 2022		1,703,213		$	3.13

Summary of Stock-Based Compensation Expense

Total stock-based compensation expense recognized was as follows (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
Cost of goods sold	$	97	$	66	$	240	$	236
Sales and marketing		729		406		1,918		1,701
Research and development		4		8		33		127
General and administrative		1,147		595		2,985		3,620
Total	$	1,977	$	1,075	$	5,176	$	5,684

The above stock-based compensation expense related to the following equity-based awards (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
Stock options	$	954	$	1,075		2,969		5,684
RSU		852		—		1,982		—
ESPP		171		—		225		—
Total	$	1,977	$	1,075	$	5,176	$	5,684

Schedule of Fair Value of Stock Options Estimated Using Weighted-Average Assumptions

The fair value of stock options was estimated using the following weighted-average assumptions:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
Expected dividends		0%		0%		0%		0%
Expected volatility		72.20%		73.3% - 75.0%		70.8%-72.2%		72.9% - 75.9%
Risk-free interest rate		2.8%		0.9% - 1.1%		1.9%-3.0%		0.6% - 1.1%
Expected term		6 years		5 - 6 years		6 years		5 - 6 years