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Consolidated Balance Sheets (Parentheticals) - USD ($)
Dec. 31, 2023
Dec. 31, 2022
Accounts receivable, allowance for doubtful accounts $ 134,912 $ 59,559
Inventories, allowance for excess and obsolete inventory 867,458 663,227
Property and equipment, accumulated depreciation 11,828,200 9,046,499
Intangible assets, accumulated depreciations $ 558,555 $ 438,250
Preferred stock, par value (in dollars per share) $ 0.001 $ 0.001
Preferred stock, authorized (in shares) 2,500,000 2,500,000
Preferred stock, issued (in shares) 0 0
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, authorized (in shares) 50,000,000 50,000,000
Common stock, issued (in shares) 5,727,310 5,498,260
Common stock, outstanding (in shares) 5,727,310 5,498,260