Common Stock and Common Stock Purchase Warrants (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands			1 Months Ended	3 Months Ended	9 Months Ended
	May 31, 2023	Dec. 29, 2022	May 31, 2023	Mar. 31, 2023	Sep. 30, 2023	Dec. 31, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity, Reverse Stock Split		the Company received a notice from the Listing Qualifications Department of Nasdaq stating that, for the prior 30 consecutive business days (through December 28, 2022), the closing bid price of the Company’s common stock had been below the minimum of $1 per share required for continued listing on the Nasdaq Capital Market under Nasdaq Listing Rule 5550(a)(2). The notification letter stated that the Company would be afforded 180 calendar days (until June 27, 2023) to regain compliance. On June 28, 2023, the Company received a second notice from the Listing Qualifications Department of Nasdaq granting the Company a 180-day extension (or until December 26, 2023) to regain compliance with the minimum bid price requirement. In order to regain compliance, the closing bid price of the Company’s common stock must be at least $1 for a minimum of ten consecutive business days		the Company’s Certificate of Incorporation, to effect, at any time prior to the one-year anniversary date of the Special Meeting, (i) a reverse split of the Company’s outstanding shares of common stock at a specific ratio, ranging from 1-for-5 to 1-for-15, to be determined by the board of directors of the Company in its sole discretion, and (ii) an associated reduction in the number of shares of common stock the Company is authorized to issue, from 250,000,000 shares to 50,000,000 shares. If the Company’s board of directors authorizes the Company to consummate the reverse stock split, the Company anticipates it will regain compliance with the Nasdaq requirements for continued listing through such transaction.
Stock issued for services					$ 749
At-the-market equity facility, shares					2,330,747
At-the-market equity facility, value					$ 1,165
Series Z Warrants [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total warrants outstanding					11,937,450	11,937,450
Exercise price					$ 1.60	$ 1.60
Warrants expire date					Apr. 30, 2024	Apr. 30, 2024
Common Stock [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stock issued for services, shares					1,500,000
Stock issued for services					$ 2
Payments for commissions percentage					3.00%
Series Z Warrants [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Number of warrants exercised					0
April 2022 Senior Convertible Note and September 2022 Senior Convertible Note [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Convertible common stock shares issued upon conversion					20,383,445
Debt Instrument, Convertible, If-converted Value in Excess of Principal					$ 5,102
Employee Stock Purchase Plan [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Number of common stock issued					877,230
Research and Development Agreement [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stock issued for services, shares	1,500,000		1,500,000
Stock issued for services	$ 602		$ 750