v3.26.1
Note 3 - Summary of Significant Accounting Policies - Restatement (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Net loss attributable to Capstone Holding Corp. stockholders (in thousands) $ (1,380) $ (700) $ (3,295) $ (3,133)
Weighted Average Number of Shares Outstanding, Basic (in shares) 12,643,383 5,235,240 10,998,115 3,405,568
Net loss per share attributable to Capstone Holding Corp. stockholders - basic and diluted (in dollars per share) $ (0.11) $ (0.13) $ (0.3) $ (0.92)
Previously Reported [Member]        
Net loss attributable to Capstone Holding Corp. stockholders (in thousands)   $ (700)   $ (3,133)
Weighted Average Number of Shares Outstanding, Basic (in shares)   5,406,305   5,406,305
Net loss per share attributable to Capstone Holding Corp. stockholders - basic and diluted (in dollars per share)   $ (0.13)   $ (0.58)
Revision of Prior Period, Adjustment [Member]        
Net loss attributable to Capstone Holding Corp. stockholders (in thousands)   $ 0   $ 0
Weighted Average Number of Shares Outstanding, Basic (in shares)   (171,065)   (2,000,737)
Net loss per share attributable to Capstone Holding Corp. stockholders - basic and diluted (in dollars per share)   $ 0   $ (0.34)