Note 13 - Concentrations (Details Textual)	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Customer Concentration Risk [Member] \| Advertising Revenue [Member]
Number of Major Customers	1	1

Represents the number of major customers accounting for 10% or more of the specified concentration risk benchmark, which includes, but not limited to, sales revenue, accounts receivable, etc.

No definition available.

Name:	sgldf_NumberOfMajorCustomers
Namespace Prefix:	sgldf_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration