CONDENSED CONSOLIDATED BALANCE SHEETS (Parentheticals) (unaudited) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Deferred franchise and regional developer fee revenue, current portion	$ 3,198,750	$ 3,000,369
Series A preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Series A preferred stock, shares authorized (in shares)	50,000	50,000
Series A preferred stock, shares issued (in shares)	0	0
Series A preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	20,000,000	20,000,000
Common stock, shares issued (in shares)	14,444,982	14,174,237
Common stock, shares outstanding (in shares)	14,413,339	14,157,070
Treasury stock, shares (in shares)	31,643	17,167
Variable Interest Entity, Primary Beneficiary
Deferred franchise and regional developer fee revenue, current portion	$ 3,100,000	$ 2,600,000