Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies (Details)

Commitments and Contingencies (Details) - USD ($)
1 Months Ended 6 Months Ended
Aug. 29, 2019
Oct. 23, 2018
May 29, 2018
Oct. 25, 2017
Jun. 30, 2021
Jun. 30, 2020
Commitments and Contingencies (Details) [Line Items]            
Stock purchase agreement, description       Beijing Genexosome and Yu Zhou, MD, PhD, the sole shareholder of Beijing Genexosome, pursuant to which Genexosome acquired all of the issued and outstanding securities of Beijing Genexosome in consideration of a cash payment in the amount of $450,000, of which $100,000 is still owed. Further, on October 25, 2017, Genexosome entered into and closed an Asset Purchase Agreement with Dr. Zhou, pursuant to which the Company acquired all assets, including all intellectual property and exosome separation systems, held by Dr. Zhou pertaining to the business of researching, developing and commercializing exosome technologies. In consideration of the assets, Genexosome paid Dr. Zhou $876,087 in cash, transferred 500,000 shares of common stock of the Company to Dr. Zhou and issued Dr. Zhou 400 shares of common stock of Genexosome.    
Operating leases, rent expense         $ 73,000 $ 78,000
Joint venture agreement, description   ●Contributing registered capital of RMB 5,000,000 (approximately $0.8 million) for working capital purposes as required by local regulation, which is not required to be contributed immediately and will be contributed subject to Avactis’ discretion;    ●assist AVAR in setting up its business operations and obtaining all required permits and licenses from the Chinese government;    ●assisting AVAR in recruiting, hiring and retaining personnel;    ●providing AVAR with access to various hospital networks in China to assist in the testing and commercialization of the CAR-T/CAR-NK/TCR-T/universal cellular immunotherapy technology in China;    ●assisting AVAR in managing the Good Manufacturing Practices (GMP) facility and clinic to be developed by AVAR;    ●providing AVAR with advice pertaining to conducting clinicals in China; and    ●Within 6 days of signing the AVAR Agreement, Avactis is required to pay to Arbele $300,000 as a research and development fee with an additional two payments of $300,000 (for a total of $900,000) to be paid upon mutually agreed upon milestones.        
Avalon Shanghai [Member]            
Commitments and Contingencies (Details) [Line Items]            
Joint venture agreement, description     Avalon Shanghai entered into a Joint Venture Agreement with Jiangsu Unicorn Biological Technology Co., Ltd. (“Unicorn”), pursuant to which a company named Epicon Biotech Co., Ltd. (“Epicon”) was formed on August 14, 2018. Epicon is owned 60% by Unicorn and 40% by Avalon Shanghai. Within five years of execution of the Joint Venture Agreement, Unicorn shall invest cash into Epicon in an amount not less than RMB 8,000,000 (approximately $1.2 million) and the premises of the laboratories of Nanjing Hospital of Chinese Medicine for exclusive use by Epicon, and Avalon Shanghai shall invest cash into Epicon in an amount not less than RMB 10,000,000 (approximately $1.5 million). Epicon is focused on cell preparation, third party testing, biological sample repository for commercial and scientific research purposes and the clinical transformation of scientific achievements. As of June 30, 2021, Avalon Shanghai has contributed RMB 4,760,000 (approximately $0.7 million) that was included in equity method investment on the accompanying condensed consolidated balance sheets.      
AVAR BioTherapeutics (China) Co. Ltd. [Member]            
Commitments and Contingencies (Details) [Line Items]            
Joint venture agreement, description   Avactis Biosciences, Inc. (“Avactis”), a wholly-owned subsidiary of the Company, and Arbele Limited (“Arbele”) agreed to the establishment of AVAR BioTherapeutics (China) Co. Ltd. (“AVAR”), a Sino-foreign equity joint venture, pursuant to an Equity Joint Venture Agreement (the “AVAR Agreement”), which will be owned 60% by Avactis and 40% by Arbele. The purpose and business scope of the Joint Venture is to research, develop, produce, sell, distribute and generally commercialize CAR-T/CAR-NK/TCR-T/universal cellular immunotherapy in China. Avactis is required to contribute $10 million (or equivalent in RMB) in cash and/or services, which shall be contributed in tranches based on milestones to be determined jointly by AVAR and Avactis in writing subject to Avactis’ cash reserves. Within 30 days, Arbele shall make a contribution of $6.66 million in the form of entering into a License Agreement with AVAR granting AVAR with an exclusive right and license in China to its technology and intellectual property pertaining to CAR-T/CAR-NK/TCR-T/universal cellular immunotherapy technology and any additional technology developed in the future with terms and conditions to be mutually agreed upon Avactis and AVAR and services.        
Research and development expense         900,000  
Line of Credit Agreement [Member]            
Commitments and Contingencies (Details) [Line Items]            
Line of credit $ 20,000,000          
Line of credit bears interest at an annual rate 5.00%          
Received loan         $ 3,393,188