CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
CURRENT ASSETS:
Accounts receivable, allowance for doubtful accounts	$ 296,793	$ 62,000
STOCKHOLDERS' EQUITY:
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	20,223,498	17,733,617
Common stock, shares outstanding (in shares)	20,223,498	17,733,617
Treasury stock, shares (in shares)	41,141	0