Stockholders’ Equity -Litigation Settlement (Details) - USD ($) $ in Thousands		6 Months Ended
May 02, 2017	Jun. 30, 2017
Stockholders’ Equity
Shares issued in exchange of litigation settlement	$ 4,000	$ 4,000
Shares issued in exchange of litigation settlement (in shares)	275,862

Value of shares of stock issued in settlement of litigation.

No definition available.

Name:	sld_StockIssuedDuringPeriodValueLitigationSettlement
Namespace Prefix:	sld_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration