Quarterly report pursuant to Section 13 or 15(d)

Document And Entity Information

Document And Entity Information - shares
6 Months Ended
Jun. 30, 2022
Aug. 08, 2022
Document Information [Line Items]    
Entity Central Index Key 0000810509  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Document Fiscal Period Focus Q2  
Document Fiscal Year Focus 2022  
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2022  
Document Transition Report false  
Entity File Number 001-35076  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 31-1080091  
Entity Address, Address Line One 4995 Bradenton Avenue, Suite 240  
Entity Address, City or Town Dublin  
Entity Address, State or Province OH  
Entity Address, Postal Zip Code 43017-3552  
City Area Code 614  
Local Phone Number 793-7500  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   30,367,292
Preferred Stock Purchase Rights [Member]    
Document Information [Line Items]    
Title of 12(b) Security Preferred Stock Purchase Rights  
Common Stock [Member]    
Document Information [Line Items]    
Title of 12(b) Security Common Stock  
Trading Symbol NAVB  
Security Exchange Name NYSEAMER