v3.8.0.1
Document and Entity Information - shares
9 Months Ended
Sep. 30, 2017
Nov. 03, 2017
Document And Entity Information    
Entity Registrant Name APPLIED OPTOELECTRONICS, INC.  
Entity Central Index Key 0001158114  
Document Type 10-Q  
Document Period End Date Sep. 30, 2017  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Is Entity's Reporting Status Current? Yes  
Entity Filer Category Accelerated Filer  
Entity Common Stock, Shares Outstanding   19,382,186
Document Fiscal Period Focus Q3  
Document Fiscal Year Focus 2017