Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001840292-23-000015-index-headers.html | 2023-03-29 16:08:32 | |
| 0001840292-23-000015-index.html | 2023-03-29 16:08:32 | |
| 0001840292-23-000015.txt | 2023-03-29 16:08:32 | |
 0001840292-23-000015-xbrl.zip | 459816 | 2023-03-29 16:08:32 |
| ex1014-christieemploymenta.htm | 83048 | 2023-03-29 16:08:32 |
| ex1015-tomemploymentagreem.htm | 77029 | 2023-03-29 16:08:32 |
| ex1016-nonxemployeedirecto.htm | 23395 | 2023-03-29 16:08:32 |
| ex231pwcconsent-202210xk.htm | 3200 | 2023-03-29 16:08:32 |
| ex232bdoconsent-202210xk.htm | 3085 | 2023-03-29 16:08:32 |
| ex311-202210xk.htm | 11753 | 2023-03-29 16:08:32 |
| ex312-202210xk.htm | 11772 | 2023-03-29 16:08:32 |
| ex321-202210xk.htm | 6058 | 2023-03-29 16:08:32 |
| ex322-202210xk.htm | 5978 | 2023-03-29 16:08:32 |
| FilingSummary.xml | 58611 | 2023-03-29 16:08:32 |
| Financial_Report.xlsx | 150858 | 2023-03-29 16:08:32 |
| hlg-20221231.htm | 2292790 | 2023-03-29 16:08:32 |
| hlg-20221231.xsd | 82274 | 2023-03-29 16:08:32 |
| hlg-20221231_cal.xml | 127380 | 2023-03-29 16:08:32 |
| hlg-20221231_def.xml | 461167 | 2023-03-29 16:08:32 |
| hlg-20221231_htm.xml | 1487723 | 2023-03-29 16:08:32 |
| hlg-20221231_lab.xml | 998375 | 2023-03-29 16:08:32 |
| hlg-20221231_pre.xml | 685677 | 2023-03-29 16:08:32 |
| MetaLinks.json | 1070313 | 2023-03-29 16:08:32 |
| R1.htm | 68857 | 2023-03-29 16:08:32 |
| R10.htm | 45121 | 2023-03-29 16:08:32 |
| R11.htm | 53238 | 2023-03-29 16:08:32 |
| R12.htm | 48977 | 2023-03-29 16:08:32 |
| R13.htm | 18703 | 2023-03-29 16:08:32 |
| R14.htm | 37015 | 2023-03-29 16:08:32 |
| R15.htm | 29361 | 2023-03-29 16:08:32 |
| R16.htm | 20513 | 2023-03-29 16:08:32 |
| R17.htm | 32764 | 2023-03-29 16:08:32 |
| R18.htm | 15086 | 2023-03-29 16:08:32 |
| R19.htm | 69067 | 2023-03-29 16:08:32 |
| R2.htm | 8045 | 2023-03-29 16:08:32 |
| R20.htm | 70534 | 2023-03-29 16:08:32 |
| R21.htm | 27384 | 2023-03-29 16:08:32 |
| R22.htm | 8301 | 2023-03-29 16:08:32 |
| R23.htm | 33864 | 2023-03-29 16:08:32 |
| R24.htm | 7493 | 2023-03-29 16:08:32 |
| R25.htm | 29605 | 2023-03-29 16:08:32 |
| R26.htm | 44929 | 2023-03-29 16:08:32 |
| R27.htm | 6566 | 2023-03-29 16:08:32 |
| R28.htm | 91683 | 2023-03-29 16:08:32 |
| R29.htm | 13015 | 2023-03-29 16:08:32 |
| R3.htm | 107344 | 2023-03-29 16:08:32 |
| R30.htm | 52528 | 2023-03-29 16:08:32 |
| R31.htm | 43532 | 2023-03-29 16:08:32 |
| R32.htm | 35945 | 2023-03-29 16:08:32 |
| R33.htm | 27349 | 2023-03-29 16:08:32 |
| R34.htm | 18693 | 2023-03-29 16:08:32 |
| R35.htm | 35473 | 2023-03-29 16:08:32 |
| R36.htm | 14455 | 2023-03-29 16:08:32 |
| R37.htm | 70071 | 2023-03-29 16:08:32 |
| R38.htm | 64206 | 2023-03-29 16:08:32 |
| R39.htm | 29093 | 2023-03-29 16:08:32 |
| R4.htm | 21839 | 2023-03-29 16:08:32 |
| R40.htm | 33831 | 2023-03-29 16:08:32 |
| R41.htm | 30295 | 2023-03-29 16:08:32 |
| R42.htm | 46666 | 2023-03-29 16:08:32 |
| R43.htm | 40714 | 2023-03-29 16:08:32 |
| R44.htm | 22851 | 2023-03-29 16:08:32 |
| R45.htm | 34309 | 2023-03-29 16:08:32 |
| R46.htm | 133149 | 2023-03-29 16:08:32 |
| R47.htm | 4666 | 2023-03-29 16:08:32 |
| R48.htm | 22652 | 2023-03-29 16:08:32 |
| R49.htm | 53221 | 2023-03-29 16:08:32 |
| R5.htm | 112301 | 2023-03-29 16:08:32 |
| R50.htm | 19016 | 2023-03-29 16:08:32 |
| R51.htm | 22369 | 2023-03-29 16:08:32 |
| R52.htm | 19853 | 2023-03-29 16:08:32 |
| R53.htm | 20496 | 2023-03-29 16:08:32 |
| R54.htm | 17925 | 2023-03-29 16:08:32 |
| R55.htm | 24375 | 2023-03-29 16:08:32 |
| R56.htm | 17288 | 2023-03-29 16:08:32 |
| R57.htm | 17387 | 2023-03-29 16:08:32 |
| R58.htm | 16992 | 2023-03-29 16:08:32 |
| R59.htm | 18993 | 2023-03-29 16:08:32 |
| R6.htm | 93867 | 2023-03-29 16:08:32 |
| R60.htm | 49133 | 2023-03-29 16:08:32 |
| R61.htm | 25735 | 2023-03-29 16:08:32 |
| R62.htm | 32955 | 2023-03-29 16:08:32 |
| R63.htm | 11343 | 2023-03-29 16:08:32 |
| R64.htm | 19163 | 2023-03-29 16:08:32 |
| R65.htm | 13447 | 2023-03-29 16:08:32 |
| R66.htm | 19582 | 2023-03-29 16:08:32 |
| R67.htm | 16006 | 2023-03-29 16:08:32 |
| R68.htm | 11809 | 2023-03-29 16:08:32 |
| R69.htm | 12149 | 2023-03-29 16:08:32 |
| R7.htm | 136616 | 2023-03-29 16:08:32 |
| R70.htm | 44570 | 2023-03-29 16:08:32 |
| R71.htm | 32870 | 2023-03-29 16:08:32 |
| R72.htm | 12191 | 2023-03-29 16:08:32 |
| R73.htm | 70730 | 2023-03-29 16:08:32 |
| R74.htm | 11390 | 2023-03-29 16:08:32 |
| R75.htm | 18379 | 2023-03-29 16:08:32 |
| R76.htm | 48510 | 2023-03-29 16:08:32 |
| R77.htm | 26991 | 2023-03-29 16:08:32 |
| R78.htm | 42528 | 2023-03-29 16:08:32 |
| R79.htm | 19463 | 2023-03-29 16:08:32 |
| R8.htm | 4083 | 2023-03-29 16:08:32 |
| R80.htm | 27411 | 2023-03-29 16:08:32 |
| R81.htm | 30104 | 2023-03-29 16:08:32 |
| R82.htm | 10327 | 2023-03-29 16:08:32 |
| R83.htm | 8893 | 2023-03-29 16:08:32 |
| R84.htm | 6941 | 2023-03-29 16:08:32 |
| R85.htm | 20342 | 2023-03-29 16:08:32 |
| R86.htm | 24959 | 2023-03-29 16:08:32 |
| R87.htm | 7192 | 2023-03-29 16:08:32 |
| R88.htm | 20517 | 2023-03-29 16:08:32 |
| R89.htm | 19452 | 2023-03-29 16:08:32 |
| R9.htm | 32483 | 2023-03-29 16:08:32 |
| R90.htm | 24826 | 2023-03-29 16:08:32 |
| R91.htm | 5541 | 2023-03-29 16:08:32 |
| R92.htm | 11388 | 2023-03-29 16:08:32 |
| R93.htm | 6625 | 2023-03-29 16:08:32 |
| report.css | 2768 | 2023-03-29 16:08:32 |
| Show.js | 1086 | 2023-03-29 16:08:32 |