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Stockholders' Equity, Common Stock Purchase Warrants, and Noncontrolling Interest - Schedule of Noncontrolling Interest (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
NCI - equity (deficit) - beginning of period $ (814)  
Net loss attributable to NCI (1,612) $ (811)
NCI - equity (deficit) - end of period (2,369) (814)
Non-controlling Interest [Member]    
NCI - equity (deficit) - beginning of period (814) (161)
NCI - equity (deficit) - end of period (2,369) (814)
Non-controlling Interest [Member] | Solys Diagnostics Inc. [Member]    
Minority Interest investment Solys Diagnostics Inc 889
Minority Interest share subscription receivable - Solys Diagnostics Inc. (889)
Net loss attributable to NCI (109) (10)
Non-controlling Interest [Member] | Lucid Diagnostics Inc [Member]    
Lucid Diagnostics Inc. 2018 Equity Plan stock option exercise 5
Net loss attributable to NCI (1,503) (801)
Stock-based compensation expense - Lucid Diagnostics Inc 2018 Equity Plan $ 52 $ 158