XML 50 R37.htm IDEA: XBRL DOCUMENT
v3.19.1

Organization and Nature of Business (Detail) T in Millions | May 31, 2018 T
--- | ---
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Processing capacity | 5.5

X
- Definition Current annual processing capacity. + References No definition available. + Details
Name: | snd_CurrentAnnualProcessingCapacity
Namespace Prefix: | snd_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration