XML 31 R13.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Prepaid Expenses and Other Current Assets | 12 Months Ended
--- | ---
Dec. 31, 2017
Text Block [Abstract] |
Prepaid Expenses and Other Current Assets | 6. Prepaid Expenses and Other Current Assets Prepaid expenses and other current assets comprised of the following:
|  | December 31, |
|  | 2017 |  |  | 2016 |
Prepaid insurance |  | $ | 551 |  |  | $ | 514 |
Prepaid expenses |  |  | 1,112 |  |  |  | 861 |
Prepaid income taxes |  |  | 1,382 |  |  |  | - |
Rail rebate receivables |  |  | 776 |  |  |  | - |
Other receivables |  |  | 28 |  |  |  | 28 |
Total prepaid expenses and other current assets |  | $ | 3,849 |  |  | $ | 1,403 |

X
- Definition Prepaid expenses and other current assets. + References No definition available. + Details
Name: | snd_PrepaidExpensesAndOtherCurrentAssetsTextBlock
Namespace Prefix: | snd_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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