2013 SEC Filings (XBRL Files)
XBRL Item – Ex-101.INS-XBRL Instance Document - nick-20130331.xml -
XBRL Item – Ex-101.SCH-XBRL Taxonomy Extension Schema Document - nick-20130331.xsd -
XBRL Item – Ex-101.CAL-XBRL Taxonomy Extension Calculation Linkbase Document - nick-20130331_cal.xml -
XBRL Item – Ex-101.LAB-XBRL Taxonomy Extension Label Linkbase Document - nick-20130331_lab.xml -
XBRL Item – Ex-101.PRE-XBRL Taxonomy Extension Presentation Linkbase Document - nick-20130331_pre.xml </a -
XBRL Item – Ex-101.DEF-XBRL Taxonomy Extension Definition Linkbase Document - nick-20130331_def.xml -
XBRL Item – Ex-101.INS-XBRL Instance Document - nick-20121231.xml -
XBRL Item – Ex-101.SCH-XBRL Taxonomy Extension Schema Document - nick-20121231.xsd -
XBRL Item – Ex-101.CAL-XBRL Taxonomy Extension Calculation Linkbase Document - nick-20121231_cal.xml -
XBRL Item – Ex-101.LAB-XBRL Taxonomy Extension Label Linkbase Document - nick-20121231_lab.xml -
XBRL Item – Ex-101.PRE-XBRL Taxonomy Extension Presentation Linkbase Document - nick-20121231_pre.xml -
>XBRL Item – Ex-101.DEF-XBRL Taxonomy Extension Definition Linkbase Document - nick-20121231_def.xml -
XBRL Item – Ex-101.INS-XBRL Instance Document - nick-20120930.xml -
XBRL Item – Ex-101.SCH-XBRL Taxonomy Extension Schema Document - nick-20120930.xsd -
XBRL Item – Ex-101.CAL-XBRL Taxonomy Extension Calculation Linkbase Document - nick-20120930_cal.xml -
XBRL Item – Ex-101.LAB-XBRL Taxonomy Extension Label Linkbase Document - nick-20120930_lab.xml -
XBRL Item – Ex-101.PRE-XBRL Taxonomy Extension Presentation Linkbase Document - nick-20120930_pre.xml - >
XBRL Item – Ex-101.DEF-XBRL Taxonomy Extension Definition Linkbase Document - nick-20120930_def.xml -
XBRL Item – Ex-101.INS-XBRL Instance Document - nick-20120630.xml -
XBRL Item – Ex-101.SCH-XBRL Taxonomy Extension Schema Document - nick-20120630.xsd -
XBRL Item – Ex-101.CAL-XBRL Taxonomy Extension Calculation Linkbase Document - nick-20120630_cal.xml -
XBRL Item – Ex-101.LAB-XBRL Taxonomy Extension Label Linkbase Document - nick-20120630_lab.xml -
XBRL Item – Ex-101.PRE-XBRL Taxonomy Extension Presentation Linkbase Document - nick-20120630_pre.xml -
XBRL Item – Ex-101.DEF-XBRL Taxonomy Extension Definition Linkbase Document - nick-20120630_def.xml -
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