Quarterly report pursuant to Section 13 or 15(d)

Other long-term liabilities - Other long-term liabilities (Details)

v3.21.1
Other long-term liabilities - Other long-term liabilities (Details) - USD ($)
Mar. 31, 2021
Dec. 31, 2020
Payables and Accruals [Abstract]    
Severance liability $ 293,254 $ 297,120
Customer deposit balance 348,022 366,947
Total other long-term liabilities $ 641,276 $ 664,067