Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000863436-19-000006-index-headers.html | 2019-02-28 16:01:54 | |
| 0000863436-19-000006-index.html | 2019-02-28 16:01:54 | |
| 0000863436-19-000006.txt | 2019-02-28 16:01:54 | |
 0000863436-19-000006-xbrl.zip | 303886 | 2019-02-28 16:01:54 |
| bhe-20181231.xml | 4132470 | 2019-02-28 16:01:54 |
| bhe-20181231.xsd | 73227 | 2019-02-28 16:01:54 |
| bhe-20181231_cal.xml | 118439 | 2019-02-28 16:01:54 |
| bhe-20181231_def.xml | 427688 | 2019-02-28 16:01:54 |
| bhe-20181231_lab.xml | 881701 | 2019-02-28 16:01:54 |
| bhe-20181231_pre.xml | 751258 | 2019-02-28 16:01:54 |
| ex21.htm | 41569 | 2019-02-28 16:01:54 |
| ex23.htm | 4607 | 2019-02-28 16:01:54 |
| ex31_1.htm | 15947 | 2019-02-28 16:01:54 |
| ex31_2.htm | 16365 | 2019-02-28 16:01:54 |
| ex32_1.htm | 6977 | 2019-02-28 16:01:54 |
| ex32_2.htm | 7202 | 2019-02-28 16:01:54 |
| FilingSummary.xml | 62536 | 2019-02-28 16:01:54 |
| Financial_Report.xlsx | 137054 | 2019-02-28 16:01:54 |
| form10k.htm | 3399420 | 2019-02-28 16:01:54 |
 maindocument001x30x0.gif | 15169 | 2019-02-28 16:01:54 |
| R1.htm | 35616 | 2019-02-28 16:01:54 |
| R10.htm | 12898 | 2019-02-28 16:01:54 |
| R11.htm | 14600 | 2019-02-28 16:01:54 |
| R12.htm | 22336 | 2019-02-28 16:01:54 |
| R13.htm | 88877 | 2019-02-28 16:01:54 |
| R14.htm | 41114 | 2019-02-28 16:01:54 |
| R15.htm | 38452 | 2019-02-28 16:01:54 |
| R16.htm | 99298 | 2019-02-28 16:01:54 |
| R17.htm | 191308 | 2019-02-28 16:01:54 |
| R18.htm | 14525 | 2019-02-28 16:01:54 |
| R19.htm | 14550 | 2019-02-28 16:01:54 |
| R2.htm | 75801 | 2019-02-28 16:01:54 |
| R20.htm | 5848 | 2019-02-28 16:01:54 |
| R21.htm | 7533 | 2019-02-28 16:01:54 |
| R22.htm | 124983 | 2019-02-28 16:01:54 |
| R23.htm | 88250 | 2019-02-28 16:01:54 |
| R24.htm | 7721 | 2019-02-28 16:01:54 |
| R25.htm | 7008 | 2019-02-28 16:01:54 |
| R26.htm | 200892 | 2019-02-28 16:01:54 |
| R27.htm | 70624 | 2019-02-28 16:01:54 |
| R28.htm | 67010 | 2019-02-28 16:01:54 |
| R29.htm | 21236 | 2019-02-28 16:01:54 |
| R3.htm | 19217 | 2019-02-28 16:01:54 |
| R30.htm | 48594 | 2019-02-28 16:01:54 |
| R31.htm | 404480 | 2019-02-28 16:01:54 |
| R32.htm | 296840 | 2019-02-28 16:01:54 |
| R33.htm | 11794 | 2019-02-28 16:01:54 |
| R34.htm | 14908 | 2019-02-28 16:01:54 |
| R35.htm | 21605 | 2019-02-28 16:01:54 |
| R36.htm | 90164 | 2019-02-28 16:01:54 |
| R37.htm | 32048 | 2019-02-28 16:01:54 |
| R38.htm | 38908 | 2019-02-28 16:01:54 |
| R39.htm | 93675 | 2019-02-28 16:01:54 |
| R4.htm | 51090 | 2019-02-28 16:01:54 |
| R40.htm | 169959 | 2019-02-28 16:01:54 |
| R41.htm | 13050 | 2019-02-28 16:01:54 |
| R42.htm | 127277 | 2019-02-28 16:01:54 |
| R43.htm | 80449 | 2019-02-28 16:01:54 |
| R44.htm | 197455 | 2019-02-28 16:01:54 |
| R45.htm | 69174 | 2019-02-28 16:01:54 |
| R46.htm | 65013 | 2019-02-28 16:01:54 |
| R47.htm | 20738 | 2019-02-28 16:01:54 |
| R48.htm | 48579 | 2019-02-28 16:01:54 |
| R49.htm | 52979 | 2019-02-28 16:01:54 |
| R5.htm | 24341 | 2019-02-28 16:01:54 |
| R50.htm | 33540 | 2019-02-28 16:01:54 |
| R51.htm | 13377 | 2019-02-28 16:01:54 |
| R52.htm | 42967 | 2019-02-28 16:01:54 |
| R53.htm | 63824 | 2019-02-28 16:01:54 |
| R54.htm | 129016 | 2019-02-28 16:01:54 |
| R55.htm | 8941 | 2019-02-28 16:01:54 |
| R56.htm | 4790 | 2019-02-28 16:01:54 |
| R57.htm | 9061 | 2019-02-28 16:01:54 |
| R58.htm | 10748 | 2019-02-28 16:01:54 |
| R59.htm | 20803 | 2019-02-28 16:01:54 |
| R6.htm | 57638 | 2019-02-28 16:01:54 |
| R60.htm | 19383 | 2019-02-28 16:01:54 |
| R61.htm | 15936 | 2019-02-28 16:01:54 |
| R62.htm | 22895 | 2019-02-28 16:01:54 |
| R63.htm | 12578 | 2019-02-28 16:01:54 |
| R64.htm | 13378 | 2019-02-28 16:01:54 |
| R65.htm | 79522 | 2019-02-28 16:01:54 |
| R66.htm | 13585 | 2019-02-28 16:01:54 |
| R67.htm | 12651 | 2019-02-28 16:01:54 |
| R68.htm | 12200 | 2019-02-28 16:01:54 |
| R69.htm | 4848 | 2019-02-28 16:01:54 |
| R7.htm | 91253 | 2019-02-28 16:01:54 |
| R70.htm | 8571 | 2019-02-28 16:01:54 |
| R71.htm | 10676 | 2019-02-28 16:01:54 |
| R72.htm | 43975 | 2019-02-28 16:01:54 |
| R73.htm | 59572 | 2019-02-28 16:01:54 |
| R74.htm | 32132 | 2019-02-28 16:01:54 |
| R75.htm | 30401 | 2019-02-28 16:01:54 |
| R76.htm | 81688 | 2019-02-28 16:01:54 |
| R77.htm | 25949 | 2019-02-28 16:01:54 |
| R78.htm | 9209 | 2019-02-28 16:01:54 |
| R79.htm | 32122 | 2019-02-28 16:01:54 |
| R8.htm | 357673 | 2019-02-28 16:01:54 |
| R80.htm | 47034 | 2019-02-28 16:01:54 |
| R81.htm | 8488 | 2019-02-28 16:01:54 |
| R82.htm | 13676 | 2019-02-28 16:01:54 |
| R83.htm | 6072 | 2019-02-28 16:01:54 |
| R84.htm | 10368 | 2019-02-28 16:01:54 |
| R85.htm | 43336 | 2019-02-28 16:01:54 |
| R86.htm | 7528 | 2019-02-28 16:01:54 |
| R87.htm | 67154 | 2019-02-28 16:01:54 |
| R88.htm | 28163 | 2019-02-28 16:01:54 |
| R89.htm | 59923 | 2019-02-28 16:01:54 |
| R9.htm | 5870 | 2019-02-28 16:01:54 |
| R90.htm | 6207 | 2019-02-28 16:01:54 |
| R91.htm | 9277 | 2019-02-28 16:01:54 |
| R92.htm | 6850 | 2019-02-28 16:01:54 |
| R93.htm | 39148 | 2019-02-28 16:01:54 |
| R94.htm | 56240 | 2019-02-28 16:01:54 |
| R95.htm | 40434 | 2019-02-28 16:01:54 |
| R96.htm | 23843 | 2019-02-28 16:01:54 |
| R97.htm | 30788 | 2019-02-28 16:01:54 |
| R98.htm | 11610 | 2019-02-28 16:01:54 |
| R99.htm | 12408 | 2019-02-28 16:01:54 |
| report.css | 2768 | 2019-02-28 16:01:54 |
| Show.js | 1086 | 2019-02-28 16:01:54 |