XML 61 R43.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Organization and Business - Additional Information (Detail) $ in Thousands, t in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2015 USD ($) | Dec. 31, 2017 t
Organization Consolidation And Presentation Of Financial Statements [Abstract] |  |
Current annual nameplate processing capacity |  | 3.3
Anticipated nameplate processing capacity upon completion of expansion |  | 5.5
Correction resulted, increase in net income | $ | $ 492 |

X
- Definition Anticipated nameplate processing capacity upon completion of expansion. + References No definition available. + Details
Name: | snd_AnticipatedNameplateProcessingCapacityUponCompletionOfExpansion
Namespace Prefix: | snd_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Current annual nameplate processing capacity. + References No definition available. + Details
Name: | snd_CurrentAnnualNameplateProcessingCapacity
Namespace Prefix: | snd_
Data Type: | xbrli:integerItemType
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

X
- Definition Resulting effect of restatement to correct an error, after tax effects, on the net income of prior periods for the year in which any adjustments are first made. In statements containing more than one period, discloses the effects for each period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22658-107794 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22663-107794 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22644-107794 + Details
Name: | us-gaap_RestatementOfPriorYearIncomeNetOfTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration