Quarterly report [Sections 13 or 15(d)]

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2025
USD ($)
shares
Sep. 30, 2024
USD ($)
shares
Sep. 30, 2025
USD ($)
Segment
shares
Sep. 30, 2024
USD ($)
shares
Jun. 30, 2025
USD ($)
Dec. 31, 2024
USD ($)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]            
Cash equivalents           $ 1,100,000
Restricted cash (included in other assets) $ 56,000 $ 56,000 $ 56,000 $ 56,000   56,000
Cash and cash equivalents 1,856,000 $ 5,768,000 1,856,000 $ 5,768,000   2,377,000
Cash, cash equivalents, and short term investments 1,900,000   1,900,000     2,400,000
Property and equipment, net $ 694,000   $ 694,000     450,000
Exercisable penny options (in shares) | shares 115,627 182,169 115,627 182,169    
Number of reportable segments | Segment     1      
Number of operating segments | Segment     1      
Tools, Dies and Molds            
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]            
Depreciation and amortization expense     $ 23,200      
Useful life 7 years   7 years      
Capitalized tools $ 19,500   $ 19,500      
Machinery and Equipment            
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]            
Property and equipment, net         $ 200,200 204,000
Construction in Progress            
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]            
Property and equipment, net $ 493,600   $ 493,600     $ 245,700