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Condensed Statements of Stockholders' Equity - USD ($)
Common Stock [Member]
Additional Paid-in Capital [Member]
Treasury Stock, Common [Member]
Retained Earnings [Member]
Total
Beginning balance, value at Dec. 31, 2021 $ 7,184 $ 66,139,630   $ (46,100,351) $ 20,046,463
Shares, Outstanding, Beginning Balance at Dec. 31, 2021 7,183,874        
Vesting of restricted stocks $ 91 (91)  
Vesting of restricted stocks 91,134        
Restricted stock retired for tax withholding $ (26) (115,189)   (115,215)
Restricted stock retired for tax withholding (26,157)        
Exercise of stock option $ 24 39,508   39,532
Exercise of stock options 24,200        
Stock-based compensation 223,446   223,446
Net income   341,933 341,933
Ending balance, value at Mar. 31, 2022 $ 7,273 66,287,304   (45,758,418) 20,536,159
Shares, Outstanding, Ending Balance at Mar. 31, 2022 7,273,051        
Beginning balance, value at Dec. 31, 2022 $ 7,090 67,157,650 $ (829,563) (46,013,420) 20,321,757
Shares, Outstanding, Beginning Balance at Dec. 31, 2022 7,089,676   266,291    
Vesting of restricted stocks $ 148 (148)
Vesting of restricted stocks 147,972        
Restricted stock retired for tax withholding $ (54) 54
Restricted stock retired for tax withholding (53,647)        
Exercise of stock option $ 39 33,666 33,705
Exercise of stock options 38,909        
Stock-based compensation 295,833 295,833
Treasury shares purchased $ (93) 93 $ (208,425) (208,425)
Treasury shares purchased (92,959)        
Treasury Stock, Shares, Acquired     92,959    
Net income (993,420) (993,420)
Ending balance, value at Mar. 31, 2023 $ 7,130 $ 67,487,148 $ (1,037,988) $ (47,006,840) $ 19,449,450
Shares, Outstanding, Ending Balance at Mar. 31, 2023 7,129,951   359,250