Stockholders' Equity, Common Stock Purchase Warrants, and Noncontrolling Interest (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended		2 Months Ended	12 Months Ended
	Feb. 23, 2021	Jan. 31, 2021	Mar. 12, 2021	Dec. 31, 2020	Dec. 31, 2019	Jul. 24, 2020
Common shares authorized				150,000,000	150,000,000
Common stock, par value per share				$ 0.001	$ 0.001
Common stock, shares issued				63,819,935	40,478,861
Common stock, shares outstanding				63,819,935	40,478,861
Warrants were exercised price per share				$ 1.68	$ 1.57
Gross proceeds from issuance of common stock				$ 16,032	$ 5,413
Debt conversion share issued				10,929,202
Number of stock issued under Employee Stock Purchase Plan				306,555	82,772
Repayment of convertible debt					$ 86
2018 Stock Plan [Member]
Gross proceeds from issuance of common stock				$ 5
Number of shares, exercised				3,333
Exercise price per share				$ 1.50
Lucid Diagnostics Inc [Member]
Common stock, shares issued				10,003,333	10,000,000
Common stock, shares outstanding				10,003,333	10,000,000
Majority ownership interest percentage				81.85%	81.875%
Lucid Diagnostics Inc [Member] | 2018 Stock Plan [Member]
Number of shares, exercised				3,333
Exercise price per share				$ 1.50
Solys Diagnostics Inc. [Member]
Common stock, shares issued				9,189,190	9,189,190
Majority ownership interest percentage				90.3235%	90.3235%
Series Z Warrants [Member]
Warrants were exercised price per share				$ 1.60
Warrants exercised				100
Warrants expire date				Apr. 30, 2024
Warrants exercised description				The Company may redeem the Series Z Warrants, at the Company's option, in whole or in part, at a price of $0.01 per Series Z Warrant at any time while the Series Z Warrants are exercisable, upon a minimum of 30 days' prior written notice of redemption, if, and only if, the volume weighted average closing price of the common stock of the Company equals or exceeds $9.00 (subject to adjustment) for any 20 out of 30 consecutive trading days ending three business days before the Company issues its notice of redemption, and provided the average daily trading volume in the common stock of the Company during such 30-day period is at least 20,000 shares per day; and if, and only if, there is a current registration statement in effect with respect to the shares of Common Stock underlying such Series Z Warrants.
Series S Warrants [Member]
Warrants exercised				1,199,383
Series W Warrants [Member]
Warrants were exercised price per share				$ 5.00
Warrants expire date				Jan. 29, 2022
Warrants exercised description				upon a minimum of 30 days' prior written notice of redemption; if, and only if, the volume weighted average price of the Company's common stock equals or exceeds $10.00 (subject-to adjustment) for any 20 consecutive trading days ending three business days before the Company issues its notice of redemption, and provided the average daily trading volume in the stock is at least 20,000 shares per day; and, if, and only if, there is a current registration statement in effect with respect to the shares of common stock of the Company underlying such warrants.
Subsequent Event [Member] | Series Z Warrants [Member]
Number of common stock shares issued			773,842
Warrants were exercised price per share			$ 1.60
December 2018 Senior Convertible Note and November 2019 Senior Convertible Notes [Member]
Debt conversion share issued				10,929,202
November 2019 Senior Convertible Notes [Member] | Subsequent Event [Member]
Debt conversion share issued		667,668
Repayment of convertible debt		$ 956
Periodic payment interest		$ 7
December 2018 Senior Convertible Note [Member]
Debt conversion share issued					7,773,110
Common Stock [Member]
Common shares authorized						50,000,000
Number of common stock shares issued				10,647,500	5,480,000
Gross proceeds from issuance of common stock				$ 17,036	$ 5,480
Placement agent fee				1,004
Placement agent fees and legal fees				$ 100	$ 67
Number of stock issued under Employee Stock Purchase Plan				306,555	82,772
Offering cost					$ 34
Common Stock [Member] | Lucid Diagnostics Inc [Member]
Number of common stock shares issued				8,187,499	8,187,499
Common Stock [Member] | Subsequent Event [Member]
Number of common stock shares issued	9,782,609	6,000,000
Gross proceeds from issuance of common stock	$ 41,626	$ 13,440
Placement agent fees and legal fees	50	951
Offering cost	$ 360	$ 70
Non-controlling Interest [Member]
Majority ownership interest percentage				9.6765%	9.6765%
Non-controlling Interest [Member] | Consulting Agreement [Member]
Number of common stock shares issued				289,679	289,679
Non-controlling Interest [Member] | Case Western Reserve University [Member]
Number of common stock shares issued				943,464	943,464