Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 173,603	$ 173,603
Stockholders' equity
Common stock, authorized	40,000,000	40,000,000
Common stock, par value	$ .01	$ .01
Common stock, issued	35,362,854	35,074,922
Common stock, outstanding	35,362,854	35,074,922