Cover
Oct. 21, 2020
Sep. 16, 2020
Entity Information [Line Items]    
Document Type 8-K  
Document Period End Date Oct. 21, 2020  
Entity Registrant Name LEVEL ONE BANCORP, INC.  
Entity Incorporation, State or Country Code MI  
Entity File Number 001-38458  
Entity Tax Identification Number 71-1015624  
Entity Address, Address Line One 32991 Hamilton Court  
Entity Address, City or Town Farmington Hills  
Entity Address, State or Province MI  
Entity Address, Postal Zip Code 48334  
City Area Code (248)  
Local Phone Number 737-0300  
Written Communications false  
Pre-commencement Tender Offer false  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Soliciting Material false  
Pre-commencement Issuer Tender Offer false  
Amendment Flag   false
Entity Central Index Key   0001412707
Common Stock [Member]    
Entity Information [Line Items]    
Title of 12(b) Security Common Stock, no par value  
Trading Symbol LEVL  
Security Exchange Name NASDAQ  
Noncumulative Preferred Stock [Member]    
Entity Information [Line Items]    
Title of 12(b) Security Depositary Shares, each representing a 1/100th interest in a share of 7.50% Non-Cumulative Perpetual Preferred Stock, Series B  
Trading Symbol LEVLP  
Security Exchange Name NASDAQ