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Cover Page - USD ($)
 12 Months Ended
Dec. 31, 2020
Feb. 24, 2021
Jun. 30, 2020
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2020    
Document Transition Report false    
Entity File Number 001-37936    
Entity Registrant Name SMART SAND, INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 45-2809926    
Entity Address, Address Line One 1725 Hughes Landing Blvd    
Entity Address, Address Line Two Suite 800    
Entity Address, City or Town The Woodlands    
Entity Address, State or Province TX    
Entity Address, Postal Zip Code 77380    
City Area Code 281    
Local Phone Number 231-2660    
Title of 12(b) Security Common Stock, par value $0.001 per share    
Trading Symbol SND    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company true    
Entity Ex Transition Period true    
Entity Shell Company false    
Entity Public Float     $ 22,081,954
Entity Common Stock, Shares Outstanding   43,410,521  
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY    
Amendment Flag false    
Entity Central Index Key 0001529628    
Documents Incorporated by Reference
DOCUMENTS INCORPORATED BY REFERENCE
Portions of the registrant’s proxy statement for the 2021 Annual Meeting of Stockholders are incorporated herein by reference in Part III of this Annual Report on Form 10-K. Such proxy statement will be filed with the Securities and Exchange Commission within 120 days of the registrant’s fiscal year ended December 31, 2020.