Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2022

Equity [Abstract]

Schedule of common stock warrants

Common stock warrants

As of March 31, 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:

	March, 31	December, 31
	2022	2021
Warrants to purchase common stock	77,842	77,842
Common stock options issued and outstanding	2,179,647	2,175,685
Common stock available for future grants	1,924,967	1,934,095
Restricted stock units issued and outstanding	390,750	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, January 1, 2022	2,175,685	$	9.27	8.68	$	2,856
Options granted	39,600	$	5.49
Options exercised	(5,166)	$	0.61
Options forfeited or cancelled	(30,472)	$	8.06
Outstanding, March 31, 2022	2,179,647	$	9.24	8.46	$	2,383
Shares exercisable March 31, 2022	1,542,586	$	9.30	8.17	$	1,830
Vested and expected to vest, March 31, 2022	2,179,647	$	9.24	8.46	$	2,383

Summary of Stock-Based Compensation Expense

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

	Three Months Ended March 31,
	2022		2021
Cost of goods sold	$	69	$	15
Sales and marketing		591		63
Research and development		14		1
General and administrative		849		52
Total	$	1,523	$	131

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

	Three Months Ended March 31,
	2022		2021
Stock options	$	1,026	$	131
RSU		497		—
Total	$	1,523	$	131

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 March 31,
	2022	2021
Expected volatility	70.8%		72.9% - 74.6%
Risk-free interest rate	1.9%		0.6% - 1.1%
Dividend yield	0%		0%
Expected term	6 years		5 - 6 years