SEC Filings

10-Q September, 30, 2019

XBRL Files To download, simply click the link to display the source page, and then right-click and Save As. Note: These files are meant to be read with appropriate reader applications. Description Document XBRL INSTANCE DOCUMENT zgsi-20190930.xml XBRL TAXONOMY EXTENSION SCHEMA zgsi-20190930.xsd XBRL TAXONOMY EXTENSION CALCULATION LINKBASE zgsi-20190930_cal.xml XBRL TAXONOMY EXTENSION DEFINITION LINKBASE zgsi-20190930_def.xml XBRL…

Form 10-Q June 30, 2019

XBRL Files To download, simply click the link to display the source page, and then right-click and Save As. Note: These files are meant to be read with appropriate reader applications. Description Document XBRL INSTANCE DOCUMENT zgsi-20190630.xml XBRL TAXONOMY EXTENSION SCHEMA zgsi-20190630.xsd XBRL TAXONOMY EXTENSION CALCULATION LINKBASE zgsi-20190630_cal.xml XBRL TAXONOMY EXTENSION DEFINITION LINKBASE zgsi-20190630_def.xml XBRL…

Form 10Q March 31, 2019

XBRL Files To download, simply click the link to display the source page, and then right-click and Save As. Note: These files are meant to be read with appropriate reader applications.   Description Document XBRL INSTANCE DOCUMENT zgsi-20190331.xml XBRL TAXONOMY EXTENSION SCHEMA zgsi-20190331.xsd XBRL TAXONOMY EXTENSION CALCULATION LINKBASE zgsi-20190331_cal.xml XBRL TAXONOMY EXTENSION DEFINITION LINKBASE zgsi-20190331_def.xml…

Form 10K December 31, 2018

XBRL Files To download, simply click the link to display the source page, and then right-click and Save As.    Description Document XBRL INSTANCE DOCUMENT zgsi-20181231.xml XBRL TAXONOMY EXTENSION SCHEMA zgsi-20181231.xsd XBRL TAXONOMY EXTENSION CALCULATION LINKBASE zgsi-20181231_cal.xml XBRL TAXONOMY EXTENSION DEFINITION LINKBASE zgsi-20181231_def.xml XBRL TAXONOMY EXTENSION LABEL LINKBASE zgsi-20181231_lab.xml XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE zgsi-20181231_pre.xml

Form 8-K April 29, 2019

8-K_ZGSI_4.29.19_(JWK)

Form 8-K December 11, 2018

8K Notes_12.11.18_filed-6-12-19 _FINAL

Form 10-Q_September 30, 2018

XBRL Files To download, simply click the link to display the source page, and then right-click and Save As.    Description Document XBRL INSTANCE DOCUMENT zgsi-20180930.xml XBRL TAXONOMY EXTENSION SCHEMA zgsi-20180930.xsd XBRL TAXONOMY EXTENSION CALCULATION LINKBASE zgsi-20180930_cal.xml XBRL TAXONOMY EXTENSION DEFINITION LINKBASE zgsi-20180930_def.xml XBRL TAXONOMY EXTENSION LABEL LINKBASE zgsi-20180930_lab.xml XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE zgsi-20180930_pre.xml

Form 10-Q_June 30, 2018

XBRL Files To download, simply click the link to display the source page, and then right-click and Save As.    Description Document XBRL INSTANCE DOCUMENT zgsi-20180630.xml XBRL TAXONOMY EXTENSION SCHEMA zgsi-20180630.xsd XBRL TAXONOMY EXTENSION CALCULATION LINKBASE zgsi-20180630_cal.xml XBRL TAXONOMY EXTENSION DEFINITION LINKBASE zgsi-20180630_def.xml XBRL TAXONOMY EXTENSION LABEL LINKBASE zgsi-20180630_lab.xml XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE zgsi-20180630_pre.xml

10-Q 1st Quarter 2018

XBRL Files To download, simply click the link to display the source page, and then right-click and Save As.    Description Document XBRL INSTANCE DOCUMENT zgsi-20180331.xml XBRL TAXONOMY EXTENSION SCHEMA zgsi-20180331.xsd XBRL TAXONOMY EXTENSION CALCULATION LINKBASE zgsi-20180331_cal.xml XBRL TAXONOMY EXTENSION DEFINITION LINKBASE zgsi-20180331_def.xml XBRL TAXONOMY EXTENSION LABEL LINKBASE zgsi-20180331_lab.xml XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE zgsi-20180331_pre.xml

10-K December 31, 2017

XBRL Files To download, simply click the link to display the source page, and then right-click and Save As.    Description Document XBRL INSTANCE DOCUMENT zgsi-20161231.xml XBRL TAXONOMY EXTENSION SCHEMA zgsi-20161231.xsd XBRL TAXONOMY EXTENSION CALCULATION LINKBASE zgsi-20161231_cal.xml XBRL TAXONOMY EXTENSION DEFINITION LINKBASE zgsi-20161231_def.xml XBRL TAXONOMY EXTENSION LABEL LINKBASE zgsi-20161231_lab.xml XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE zgsi-20161231_pre.xml