CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
CURRENT ASSETS:
Accounts receivable, allowance for doubtful accounts	$ 242,981	$ 243,042
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)	30,269,916	30,104,986
Treasury stock, shares (in shares)	48,057	48,057