XML 46 R23.htm IDEA: XBRL DOCUMENT v3.19.1

Warrants	12 Months Ended
	Dec. 31, 2018
Text Block [Abstract]
Warrants	Warrants In 2011, the Company issued certain management stockholders warrants to purchase 4,000 shares of common stock for a purchase price of $0.0045 per share. The warrants were exercisable upon the achievement of certain triggering events, as defined in the warrant agreements. On December 2, 2016, a triggering event, as defined in the warrant agreement, had been achieved and all warrants were fully exercised.

X

- Definition

Warrants disclosure.

+ References

No definition available.

+ Details

Name:	snd_WarrantsDisclosureTextBlock
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