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| 0001415889-16-004781-index.html | 2016-02-16 16:04:28 | |
| 0001415889-16-004781.txt | 2016-02-16 16:04:28 | |
 0001415889-16-004781-xbrl.zip | 130627 | 2016-02-16 16:04:28 |
| ex10-2.htm | 58347 | 2016-02-16 16:04:28 |
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| report.css | 2767 | 2016-02-16 16:04:28 |
| Show.js | 1410 | 2016-02-16 16:04:28 |
| vsta-20151231.xml | 1148313 | 2016-02-16 16:04:28 |
| vsta-20151231.xsd | 49019 | 2016-02-16 16:04:28 |
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| vsta10q_dec312015.htm | 1765528 | 2016-02-16 16:04:28 |