XML 59 R30.htm IDEA: XBRL DOCUMENT
v3.21.2

Summary of Significant Accounting Policies - Schedule of Black Scholes Valuation Models of Warrant Liabilities (Details) | Mar. 31, 2021 $ / shares shares | Feb. 12, 2021 $ / shares shares | Jan. 13, 2021 $ / shares shares | Dec. 31, 2020
--- | --- | --- | --- | ---
Warrant measurement term |  |  |  | 5 years
Risk Free Interest Rate [Member] |  |  |  |
Warrant measurement input |  |  |  | 2.31
Initial Measurement [Member] | January Warrants [Member] |  |  |  |
Warrant measurement term |  |  | 5 years |
Number of shares | shares |  |  | 1,821,514 |
Value (per share) |  |  | $ 2.66 |
Initial Measurement [Member] | January Warrants [Member] | Stock Price [Member] |  |  |  |
Warrant measurement input |  |  | 4.21 |
Initial Measurement [Member] | January Warrants [Member] | Exercise Price [Member] |  |  |  |
Warrant measurement input |  |  | 4.95 |
Initial Measurement [Member] | January Warrants [Member] | Discount Yield [Member] |  |  |  |
Warrant measurement input |  |  | 0.0 |
Initial Measurement [Member] | January Warrants [Member] | Expected Volatility [Member] |  |  |  |
Warrant measurement input |  |  | 84.7 |
Initial Measurement [Member] | January Warrants [Member] | Risk Free Interest Rate [Member] |  |  |  |
Warrant measurement input |  |  | 0.5 |
Initial Measurement [Member] | February Warrants [Member] |  |  |  |
Warrant measurement term |  | 5 years |  |
Number of shares | shares |  | 1,714,005 |  |
Value (per share) |  | $ 3.00 |  |
Initial Measurement [Member] | February Warrants [Member] | Stock Price [Member] |  |  |  |
Warrant measurement input |  | 4.62 |  |
Initial Measurement [Member] | February Warrants [Member] | Exercise Price [Member] |  |  |  |
Warrant measurement input |  | 4.95 |  |
Initial Measurement [Member] | February Warrants [Member] | Discount Yield [Member] |  |  |  |
Warrant measurement input |  | 0.0 |  |
Initial Measurement [Member] | February Warrants [Member] | Expected Volatility [Member] |  |  |  |
Warrant measurement input |  | 84.7 |  |
Initial Measurement [Member] | February Warrants [Member] | Risk Free Interest Rate [Member] |  |  |  |
Warrant measurement input |  | 0.5 |  |
Subsequent Measurement [Member] | January Warrants [Member] |  |  |  |
Warrant measurement term | 4 years 9 months 18 days |  |  |
Number of shares | shares | 1,821,514 |  |  |
Value (per share) | $ 1.74 |  |  |
Subsequent Measurement [Member] | January Warrants [Member] | Stock Price [Member] |  |  |  |
Warrant measurement input | 3.07 |  |  |
Subsequent Measurement [Member] | January Warrants [Member] | Exercise Price [Member] |  |  |  |
Warrant measurement input | 4.95 |  |  |
Subsequent Measurement [Member] | January Warrants [Member] | Discount Yield [Member] |  |  |  |
Warrant measurement input | 0.0 |  |  |
Subsequent Measurement [Member] | January Warrants [Member] | Expected Volatility [Member] |  |  |  |
Warrant measurement input | 84.7 |  |  |
Subsequent Measurement [Member] | January Warrants [Member] | Risk Free Interest Rate [Member] |  |  |  |
Warrant measurement input | 0.9 |  |  |
Subsequent Measurement [Member] | February Warrants [Member] |  |  |  |
Warrant measurement term | 4 years 10 months 25 days |  |  |
Number of shares | shares | 1,714,005 |  |  |
Value (per share) | $ 1.75 |  |  |
Subsequent Measurement [Member] | February Warrants [Member] | Stock Price [Member] |  |  |  |
Warrant measurement input | 3.07 |  |  |
Subsequent Measurement [Member] | February Warrants [Member] | Exercise Price [Member] |  |  |  |
Warrant measurement input | 4.95 |  |  |
Subsequent Measurement [Member] | February Warrants [Member] | Discount Yield [Member] |  |  |  |
Warrant measurement input | 0.0 |  |  |
Subsequent Measurement [Member] | February Warrants [Member] | Expected Volatility [Member] |  |  |  |
Warrant measurement input | 84.7 |  |  |
Subsequent Measurement [Member] | February Warrants [Member] | Risk Free Interest Rate [Member] |  |  |  |
Warrant measurement input | 0.9 |  |  |

X
- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21475-112644 + Details
Name: | us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of warrants or rights outstanding. + References No definition available. + Details
Name: | us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Value of input used to measure outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
Name: | us-gaap_WarrantsAndRightsOutstandingMeasurementInput
Namespace Prefix: | us-gaap_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition Period between issuance and expiration of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
Name: | us-gaap_WarrantsAndRightsOutstandingTerm
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputRiskFreeInterestRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementScenarioAxis=amrh_InitialMeasurementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=amrh_JanuaryWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputSharePriceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputExercisePriceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputDiscountRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputOptionVolatilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=amrh_FebruaryWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementScenarioAxis=amrh_SubsequentMeasurementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |