| Document | Jun. 01, 2021 | May 04, 2021 |
| Cover [Abstract] | ||
| Document Type | 8-K | |
| Document Period End Date | Jun. 1, 2021 | |
| Entity Registrant Name | SMART SAND, INC. | |
| Entity Incorporation, State or Country Code | DE | |
| Entity File Number | 001-37936 | |
| 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 | |
| Written Communications | false | |
| Soliciting Material | false | |
| Pre-commencement Tender Offer | false | |
| Pre-commencement Issuer Tender Offer | false | |
| Entity Emerging Growth Company | true | |
| Entity Ex Transition Period | true | |
| Amendment Flag | false | |
| Entity Central Index Key | 0001529628 |
