Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - Schedule of Fair Values of Stock Options Granted Using Black-scholes Valuation Model Assumptions (Details)

v3.19.1
Stock-Based Compensation - Schedule of Fair Values of Stock Options Granted Using Black-scholes Valuation Model Assumptions (Details)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Employee Stock Option [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Risk-free interest rate 2.10% 2.10%
Expected term of stock options (in years) 5 years 9 months 18 days 5 years 9 months 18 days
Expected stock price volatility 50.00% 50.00%
Expected dividend yield 0.00% 0.00%
Non Employee Stock Option [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Risk-free interest rate 2.50% 2.30%
Expected term of stock options (in years) 8 years 8 months 12 days 9 years
Expected stock price volatility 60.00% 60.00%
Expected dividend yield 0.00% 0.00%
Non Employee Stock Option [Member] | Lucid Diagnostics Inc [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Risk-free interest rate 2.70%  
Expected term of stock options (in years) 9 years 4 months 24 days  
Expected stock price volatility 62.00%  
Expected dividend yield 0.00%