Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

Document and Entity Information - USD ($)
12 Months Ended
Dec. 31, 2018
Mar. 25, 2019
Jun. 30, 2018
Document and Entity Information:      
Registrant CIK 0000726293    
SEC Form 10-K    
Period End date Dec. 31, 2018    
Fiscal Year End --12-31    
Trading Symbol nbgv    
Tax Identification Number (TIN) 841089377    
Number of common stock shares outstanding   59,698,055  
Public Float     $ 1,531,813
Entity a Well-known Seasoned Issuer No    
Entity a Voluntary Filer No    
Entity's Reporting Status Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Emerging Growth Company true    
Entity Small Business true    
Entity Ex Transition Period true    
Entity Shell Company false    
Amendment Flag false    
Document Fiscal Year Focus 2018    
Document Fiscal Period Focus FY    
Contained File Information, File Number 0-11730    
Entity Incorporation, State Country Name Delaware    
Entity Address, Address Line One 2545 Santa Clara Avenue    
Entity Address, City or Town Alameda    
Entity Address, State or Province California    
Entity Address, Postal Zip Code 94501    
City Area Code 801    
Local Phone Number 362-2115