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EMPLOYEE BENEFIT PLAN (Details) | 12 Months Ended
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Dec. 31, 2019
EMPLOYEE BENEFIT PLAN [Abstract] |
Employer matching contribution percentage, first portion | 100.00%
Employee contribution percentage, first portion | 3.00%
Employer matching contribution percentage, second portion | 50.00%
Employee contribution percentage, second portion | 2.00%

X
- Definition Percentage of the first portion of employee gross pay the employee contributes to a defined contribution plan in calculation matching contribution percentage by employer. + References No definition available. + Details
Name: | amrh_DefinedContributionPlanAnnualContributionsByEmployeeFirstPortionPercent
Namespace Prefix: | amrh_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of the second portion of employee gross pay the employee contributes to a defined contribution plan in calculation matching contribution percentage by employer. + References No definition available. + Details
Name: | amrh_DefinedContributionPlanAnnualContributionsByEmployeeSecondPortionPercent
Namespace Prefix: | amrh_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage employer matches of the employee's percentage second contribution matched. + References No definition available. + Details
Name: | amrh_DefinedContributionPlanEmployerMatchingContributionPercentageSecondPortion
Namespace Prefix: | amrh_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_GeneralDiscussionOfPensionAndOtherPostretirementBenefitsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration