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Business Combinations - Other (Details) - USD ($)
$ / shares in Units, $ in Thousands
Nov. 21, 2019
Mar. 31, 2020
Dec. 31, 2019
Business Combinations      
Common stock, shares outstanding   44,091,000 43,502,000
Avedro      
Business Combinations      
Exchange Ratio (as a percent) 36.50%    
Right to receive shares of Glaukos 6,449,551    
Share Price $ 63.07    
Fair value of Glaukos common stock issued in the Avedro Merger, plus an immaterial amount of cash paid for fractional shares $ 406,776    
Fair value of Glaukos common stock issued to replace certain vested Avedro warrants 189    
Fair value of Replacement Awards attributable to pre-combination services 30,786    
Total Merger Consideration $ 437,751    
Avedro | Avedro      
Business Combinations      
Common stock, shares outstanding 17,670,003