XML 57 R39.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Stock-Based Compensation (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2017
Unrecognized Compensation Expense is Expected to be Recognized | At December 31, 2017 the Company had unrecognized compensation expense of $4,254 related to granted but unvested stock awards. That expense is expected to be recognized as follows:
Year Ended December 31, |  |  |  |
2018 |  | $ | 1,901 |
2019 |  |  | 1,432 |
2020 |  |  | 727 |
2021 |  |  | 194 |
|  | $ | 4,254 |
2012 Equity Incentive Plan |
Summary of Restricted Stock Activity | The following table summarizes restricted stock activity under the Plans from January 1, 2016 through December 31, 2017:
|  | Number of Shares |  |  | Weighted Average |
Unvested, January 1, 2016 |  |  | 290 |  |  | $ | 8.02 |
Granted |  |  | 161 |  |  |  | 3.85 |
Vested |  |  | (167 | ) |  |  | (6.79 | )
Forfeiture |  |  | (10 | ) |  |  | (6.00 | )
Unvested, December 31, 2016 |  |  | 274 |  |  |  | 7.35 |
Granted |  |  | 352 |  |  |  | 14.77 |
Vested |  |  | (90 | ) |  |  | 8.01 |
Forfeiture |  |  | (2 | ) |  |  | 8.91 |
Unvested, December 31, 2017 |  |  | 534 |  |  | $ | 11.27 |

X
- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
Name: | us-gaap_NonvestedRestrictedStockSharesActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the total compensation cost related to nonvested awards not yet recognized and the weighted-average period over which it is expected to be recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfUnrecognizedCompensationCostNonvestedAwardsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_PlanNameAxis=snd_TwoThousandTwelveEquityIncentivePlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |