At June 30, 2021 and December 31, 2020, the fair values of cash, accounts receivable, accounts payable and accrued expenses approximated their carrying values because of the short-term nature of these instruments. (Details) - USD ($)	Jun. 30, 2021	Jun. 30, 2020
Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short-term borrowings and long-term debt	$ 32,510,485	$ 33,445,446
Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short-term borrowings and long-term debt	$ 32,510,485	$ 33,445,446