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Commitments and Contingencies - Other (Details)
 12 Months Ended
Nov. 14, 2018
Apr. 14, 2018
item
Dec. 31, 2019
USD ($)
item
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 30, 2014
USD ($)
Other commitments            
Letter of Credit outstanding     $ 8,800,000      
Restricted cash pledged for letter of credit     $ 8,800,000 $ 8,800,000    
Number of Months from start of lease for adjustments to Letter of Credit | item     37      
Frequency of adjustment to Letter of Credit 12 months   12 months      
Adjustment rate of Letter of Credit (as a percent)     20.00%      
Amount of Letter of Credit outstanding after adjustments     $ 2,000,000.0      
Number of other irrevocable letters of credit outstanding | item     2      
Restricted cash pledged for office lease agreement     $ 400,000      
Restricted cash pledged for credit card program     $ 200,000      
Number of lawsuits that name Avedro and Avedro board of directors as defendants | item     4      
Purchase commitment obligation     $ 5,600,000      
Purchase commitment due after one year     200,000      
Agreement with the Regents            
Other commitments            
Minimum required annual payment of the commitment obligation, based on net sales of current and future products           $ 500,000
Cost of sales | Agreement with the Regents            
Other commitments            
Commitment obligation payments     $ 5,700,000 $ 4,500,000 $ 3,900,000  
Patent Litigation | Pending Litigation            
Other commitments            
Number of patent infringements | item   3        
Number of new new petitions filed | item     5      
Accrual for loss contingency     $ 0