Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2021

Fair Value Disclosures [Abstract]

Assets and liabilities measured at fair value on a recurring basis

The tables below present information about the Company’s assets and liabilities that are measured at fair value on a recurring basis as of December 31, 2021 and December 31, 2020 and indicate the fair value hierarchy of the valuation techniques utilized to determine such fair value.

	Fair value measurements at December 31, 2021
	Quoted prices in active markets for  identical assets		Significant other observable inputs		Significant unobservable  inputs		Balance as of
Description	(Level 1)		(Level 2)		(Level 3)		December 31, 2021
Assets
Cash equivalents:
Money market funds	$	4,878	$	—	$	—	$	4,878
Short-term investments:
U.S. government and agency securities	—		10,661		—		10,661
Total assets	$	4,878	$	10,661	$	—	$	15,539

	Fair value measurements at December 31, 2020
	Quoted prices in active markets for  identical assets		Significant other observable inputs		Significant unobservable  inputs		Balance as of
Description	(Level 1)		(Level 2)		(Level 3)		December 31, 2020
Assets
Cash equivalents:
Money market funds	$	2,873	$	—	$	—	$	2,873
Short-term investments:
U.S. government and agency securities	—		6,279		—		6,279
Total assets	$	2,873	$	6,279	$	—	$	9,152

Reconciliation of beginning and ending balances for the Level 3 warrant liability

The following tables show a reconciliation of the beginning and ending balances for the Level 3 warrant liability for the year ending December 31, 2020.

	Year ended December 31, 2020
Warrant liability, December 31, 2019	$	14,977
Recognized loss from mark-to-market adjustment prior to reclassification of warrant liability to equity	957
Reclassification from warrant liability to equity	(15,934)
Warrant liability, December 31, 2020	$	—