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Stock Based Compensation (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended				6 Months Ended
	Jun. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Share-based Compensation [Abstract]
Additional shares authorized (in shares)	3,500,000
Shares available for grant (in shares)	5,253,971	5,253,971				5,253,971
Stock-based compensation expense						$ 1,364	$ 1,590
Taxes paid on cashless exercise of restricted stock units						5	29
General and Administrative Expense [Member]
Share-based Compensation [Abstract]
Stock-based compensation expense		$ 393		$ 487		764	953
Research and Development Expense [Member]
Share-based Compensation [Abstract]
Stock-based compensation expense		$ 289		$ 325		$ 600	$ 637
Stock Options [Member]
Share-based Compensation [Abstract]
Options granted (in shares)		37,500		801,004		37,500	801,004
Weighted average grant date fair value (in dollars per share)		$ 0.35		$ 1.09		$ 0.35	$ 1.09
Dividend yield						0.00%	0.00%
Volatility						81.00%	86.00%
Risk free interest rate						4.00%	3.00%
Expected term						6 years	6 years
Unrecognized stock-based compensation expense expected to be recognized related to unvested stock options	$ 3,009	$ 3,009				$ 3,009
Weighted average amortization period						2 years 3 months
Common stock issued upon exercise of options (in shares)		0		0		0	0
Number of stock options returned to plan upon expiration (in shares)		213,125		255,000		253,125	255,000
Stock options expiration period		10 years		10 years		10 years	10 years
Restricted Stock Units (RSUs) [Member]
Share-based Compensation [Abstract]
RSUs granted (in shares)		24,999	0	258,363	0
Weighted average fair value at date of grant (in dollars per share)		$ 0.5		$ 1.46
Taxes paid on cashless exercise of restricted stock units		$ 5		$ 29
Unrecognized stock-based compensation expense expected to be recognized related to unvested RSUs	$ 1,074	$ 1,074				$ 1,074
Weighted average amortization period						2 years 2 months 26 days
Common stock issued upon vesting RSUs (in shares)		215,255	0	191,795	0

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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Number of additional shares authorized for issuance under share-based payment arrangement.

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