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| 0001493152-21-007517-index.html | 2021-03-31 17:10:42 | |
| 0001493152-21-007517.txt | 2021-03-31 17:10:42 | |
 0001493152-21-007517-xbrl.zip | 74514 | 2021-03-31 17:10:42 |
| ex21-1.htm | 6149 | 2021-03-31 17:10:42 |
| ex31.htm | 16861 | 2021-03-31 17:10:42 |
| ex32.htm | 6106 | 2021-03-31 17:10:42 |
| ex4-10.htm | 29842 | 2021-03-31 17:10:42 |
| FilingSummary.xml | 20353 | 2021-03-31 17:10:42 |
| Financial_Report.xlsx | 52707 | 2021-03-31 17:10:42 |
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| hpto-20201231.xml | 363351 | 2021-03-31 17:10:42 |
| hpto-20201231.xsd | 27073 | 2021-03-31 17:10:42 |
| hpto-20201231_cal.xml | 50642 | 2021-03-31 17:10:42 |
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| R4.htm | 76947 | 2021-03-31 17:10:42 |
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| R8.htm | 28308 | 2021-03-31 17:10:42 |
| R9.htm | 8925 | 2021-03-31 17:10:42 |
| report.css | 2767 | 2021-03-31 17:10:42 |
| Show.js | 1085 | 2021-03-31 17:10:42 |