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Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2021

Fair Value Disclosures [Abstract]

Schedule of Financial Liabilities Measured at Fair Value on Recurring Basis by Level Within Fair Value Hierarchy

Schedule of Financial Liabilities Measured at Fair Value on Recurring Basis by Level Within Fair Value Hierarchy 

		Fair Value Measurements as of December 31, 2021 (in thousands)
Description		Level 1				Level 2				Level 3				Total
Derivative liability
Common stock warrants		$	-			$	-			$	347			$	347

		Fair Value Measurements as of December 31, 2020 (in thousands)
Description		Level 1				Level 2				Level 3				Total
Derivative liability
Common stock warrants		$	-			$	-			$	1,238			$	1,238

Schedule of Fair Value Measurement Hierarchy of Derivative Liability

The Company did not have any transfers of assets and liabilities between Level 1 and Level 2 of the fair value measurement hierarchy during the years ended December 31, 2021 and 2020. The following table presents a reconciliation of the derivative liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) during the years ended December 31, 2021 and 2020 (in thousands):

Schedule of Fair Value Measurement Hierarchy of Derivative Liability 

		Common Stock Warrants
Balance as of December 31, 2019		$	(220	)
Issuance of derivatives			(6,328	)
Change in fair value			2,111
Exercise of warrants			3,199
Balance as of December 31, 2020			(1,238	)
Change in fair value			696
Exercise of warrants			195
Balance as of December 31, 2021		$	(347	)

Schedule of Assumptions Used in Estimating Fair Value

The assumptions used in estimating the common stock warrant liability using the Monte Carlo simulation valuation model as of December 31, 2021 and 2020 were as follows:

Schedule of Assumptions Used in Estimating Fair Value 

			December 31, 2021				December 31, 2020
Weighted-average risk-free interest rate			0.06%-0.97	%			0.09%-0.27	%
Weighted-average expected life (in years)			0.07-3.10				0.63-4.10
Expected dividend yield			-	%			-	%
Weighted average expected volatility			71.5%-126.5	%			138.3%-175.6	%

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Tabular disclosure of liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). Where the quoted price in an active market for the identical liability is not available, the Level 1 input is the quoted price of an identical liability when traded as an asset.

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Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability.

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Tabular disclosure of assumption used to determine benefit obligation and net periodic benefit cost of defined benefit plan. Includes, but is not limited to, discount rate, rate of compensation increase, expected long-term rate of return on plan assets and interest crediting rate.

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