Document and Entity Information - shares
6 Months Ended
Jun. 30, 2019
Jul. 29, 2019
Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jun. 30, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q2  
Trading Symbol ORBC  
Entity Registrant Name ORBCOMM Inc.  
Entity Central Index Key 0001361983  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   79,754,005
Entity Current Reporting Status Yes  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity File Number 001-33118  
Entity Tax Identification Number 412118289  
Entity Address, Address Line One 395 W. Passaic Street  
Entity Address, City or Town Rochelle Park  
Entity Address, State or Province New Jersey  
Entity Address, Postal Zip Code 07662  
City Area Code 703  
Local Phone Number 433-6300