| Document | Mar. 02, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Mar. 2, 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 |
