Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000863436-18-000005-index-headers.html | 2018-03-01 07:09:25 | |
| 0000863436-18-000005-index.html | 2018-03-01 07:09:25 | |
| 0000863436-18-000005.txt | 2018-03-01 07:09:25 | |
 0000863436-18-000005-xbrl.zip | 257821 | 2018-03-01 07:09:25 |
| bhe-20171231.xml | 3005280 | 2018-03-01 07:09:25 |
| bhe-20171231.xsd | 64272 | 2018-03-01 07:09:25 |
| bhe-20171231_cal.xml | 131272 | 2018-03-01 07:09:25 |
| bhe-20171231_def.xml | 363770 | 2018-03-01 07:09:25 |
| bhe-20171231_lab.xml | 856081 | 2018-03-01 07:09:25 |
| bhe-20171231_pre.xml | 658648 | 2018-03-01 07:09:25 |
 chart.gif | 14542 | 2018-03-01 07:09:25 |
| ex21.htm | 42999 | 2018-03-01 07:09:25 |
| ex23.htm | 4004 | 2018-03-01 07:09:25 |
| ex31_1.htm | 13803 | 2018-03-01 07:09:25 |
| ex31_2.htm | 13991 | 2018-03-01 07:09:25 |
| ex32_1.htm | 6055 | 2018-03-01 07:09:25 |
| ex32_2.htm | 6186 | 2018-03-01 07:09:25 |
| FilingSummary.xml | 57357 | 2018-03-01 07:09:25 |
| Financial_Report.xlsx | 121143 | 2018-03-01 07:09:25 |
| form10k.htm | 2937448 | 2018-03-01 07:09:25 |
| R1.htm | 29988 | 2018-03-01 07:09:25 |
| R10.htm | 13384 | 2018-03-01 07:09:25 |
| R11.htm | 22339 | 2018-03-01 07:09:25 |
| R12.htm | 92340 | 2018-03-01 07:09:25 |
| R13.htm | 41451 | 2018-03-01 07:09:25 |
| R14.htm | 38448 | 2018-03-01 07:09:25 |
| R15.htm | 100390 | 2018-03-01 07:09:25 |
| R16.htm | 175288 | 2018-03-01 07:09:25 |
| R17.htm | 14523 | 2018-03-01 07:09:25 |
| R18.htm | 13100 | 2018-03-01 07:09:25 |
| R19.htm | 5850 | 2018-03-01 07:09:25 |
| R2.htm | 73729 | 2018-03-01 07:09:25 |
| R20.htm | 7344 | 2018-03-01 07:09:25 |
| R21.htm | 115272 | 2018-03-01 07:09:25 |
| R22.htm | 8317 | 2018-03-01 07:09:25 |
| R23.htm | 5344 | 2018-03-01 07:09:25 |
| R24.htm | 183401 | 2018-03-01 07:09:25 |
| R25.htm | 70580 | 2018-03-01 07:09:25 |
| R26.htm | 66857 | 2018-03-01 07:09:25 |
| R27.htm | 21237 | 2018-03-01 07:09:25 |
| R28.htm | 48606 | 2018-03-01 07:09:25 |
| R29.htm | 162076 | 2018-03-01 07:09:25 |
| R3.htm | 19235 | 2018-03-01 07:09:25 |
| R30.htm | 56388 | 2018-03-01 07:09:25 |
| R31.htm | 69350 | 2018-03-01 07:09:25 |
| R32.htm | 13701 | 2018-03-01 07:09:25 |
| R33.htm | 21611 | 2018-03-01 07:09:25 |
| R34.htm | 89988 | 2018-03-01 07:09:25 |
| R35.htm | 32070 | 2018-03-01 07:09:25 |
| R36.htm | 38904 | 2018-03-01 07:09:25 |
| R37.htm | 95878 | 2018-03-01 07:09:25 |
| R38.htm | 157761 | 2018-03-01 07:09:25 |
| R39.htm | 13048 | 2018-03-01 07:09:25 |
| R4.htm | 46029 | 2018-03-01 07:09:25 |
| R40.htm | 117456 | 2018-03-01 07:09:25 |
| R41.htm | 179662 | 2018-03-01 07:09:25 |
| R42.htm | 69154 | 2018-03-01 07:09:25 |
| R43.htm | 65026 | 2018-03-01 07:09:25 |
| R44.htm | 20736 | 2018-03-01 07:09:25 |
| R45.htm | 48591 | 2018-03-01 07:09:25 |
| R46.htm | 68756 | 2018-03-01 07:09:25 |
| R47.htm | 30691 | 2018-03-01 07:09:25 |
| R48.htm | 13380 | 2018-03-01 07:09:25 |
| R49.htm | 13742 | 2018-03-01 07:09:25 |
| R5.htm | 23466 | 2018-03-01 07:09:25 |
| R50.htm | 15760 | 2018-03-01 07:09:25 |
| R51.htm | 79638 | 2018-03-01 07:09:25 |
| R52.htm | 10771 | 2018-03-01 07:09:25 |
| R53.htm | 20821 | 2018-03-01 07:09:25 |
| R54.htm | 14959 | 2018-03-01 07:09:25 |
| R55.htm | 16226 | 2018-03-01 07:09:25 |
| R56.htm | 22633 | 2018-03-01 07:09:25 |
| R57.htm | 12878 | 2018-03-01 07:09:25 |
| R58.htm | 13393 | 2018-03-01 07:09:25 |
| R59.htm | 73317 | 2018-03-01 07:09:25 |
| R6.htm | 59508 | 2018-03-01 07:09:25 |
| R60.htm | 13298 | 2018-03-01 07:09:25 |
| R61.htm | 12361 | 2018-03-01 07:09:25 |
| R62.htm | 12201 | 2018-03-01 07:09:25 |
| R63.htm | 4850 | 2018-03-01 07:09:25 |
| R64.htm | 8582 | 2018-03-01 07:09:25 |
| R65.htm | 10700 | 2018-03-01 07:09:25 |
| R66.htm | 44061 | 2018-03-01 07:09:25 |
| R67.htm | 41034 | 2018-03-01 07:09:25 |
| R68.htm | 36214 | 2018-03-01 07:09:25 |
| R69.htm | 30415 | 2018-03-01 07:09:25 |
| R7.htm | 85432 | 2018-03-01 07:09:25 |
| R70.htm | 70778 | 2018-03-01 07:09:25 |
| R71.htm | 25750 | 2018-03-01 07:09:25 |
| R72.htm | 9216 | 2018-03-01 07:09:25 |
| R73.htm | 27868 | 2018-03-01 07:09:25 |
| R74.htm | 46608 | 2018-03-01 07:09:25 |
| R75.htm | 8530 | 2018-03-01 07:09:25 |
| R76.htm | 13427 | 2018-03-01 07:09:25 |
| R77.htm | 6071 | 2018-03-01 07:09:25 |
| R78.htm | 8380 | 2018-03-01 07:09:25 |
| R79.htm | 30034 | 2018-03-01 07:09:25 |
| R8.htm | 117339 | 2018-03-01 07:09:25 |
| R80.htm | 9373 | 2018-03-01 07:09:25 |
| R81.htm | 53983 | 2018-03-01 07:09:25 |
| R82.htm | 27261 | 2018-03-01 07:09:25 |
| R83.htm | 9278 | 2018-03-01 07:09:25 |
| R84.htm | 41336 | 2018-03-01 07:09:25 |
| R85.htm | 59837 | 2018-03-01 07:09:25 |
| R86.htm | 42048 | 2018-03-01 07:09:25 |
| R87.htm | 19973 | 2018-03-01 07:09:25 |
| R88.htm | 30570 | 2018-03-01 07:09:25 |
| R89.htm | 11028 | 2018-03-01 07:09:25 |
| R9.htm | 71950 | 2018-03-01 07:09:25 |
| R90.htm | 13284 | 2018-03-01 07:09:25 |
| report.css | 2768 | 2018-03-01 07:09:25 |
| Show.js | 1411 | 2018-03-01 07:09:25 |