Registration of securities issued in business combination transactions

Prepaid Expenses And Other Current Assets (Details)

v3.20.2
Prepaid Expenses And Other Current Assets (Details) - USD ($)
Jun. 30, 2020
Dec. 31, 2019
Dec. 31, 2018
Prepaid Expenses And Other Current Assets [Abstract]      
Deposits on contracts     $ 618,417
Prepaid expenses and other current assets   $ 447,206 555,430
Total prepaid expenses and other current assets $ 817,653 $ 447,206 $ 1,173,847