XML 91 R45.htm IDEA: XBRL DOCUMENT
v3.20.1

Equity Transactions (Details Narrative) (10-K) - USD ($) |  |  |  |  | 3 Months Ended | 6 Months Ended | 12 Months Ended | 24 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 19, 2019 | Aug. 21, 2018 | Jul. 30, 2018 | Jul. 25, 2018 | Mar. 31, 2020 | Mar. 31, 2019 | Jun. 30, 2019 | Dec. 31, 2019 | Dec. 31, 2018 | Mar. 31, 2020 | Jun. 22, 2018
Changes in fair value of warrants liability |  |  |  |  |  | $ 450,267 |  | $ (1,796,174) | $ 2,760,819 |  |
Series A Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |
Fair value of warrant liability |  |  |  |  |  |  |  |  | 1,712,000 |  |
Amendment Warrants [Member] | Option Pricing Model [Member] |  |  |  |  |  |  |  |  |  |  |
Fair value expected term |  |  |  |  |  |  |  | 5 years |  |  |
Fair value expected volatility |  |  |  |  |  |  |  | 111.80% |  |  |
Fair value risk free interest rate |  |  |  |  |  |  |  | 2.37% |  |  |
Fair value expected dividend yield |  |  |  |  |  |  |  | 0.00% |  |  |
Purchaser Warrant [Member] |  |  |  |  |  |  |  |  |  |  |
Fair value of warrant liability |  |  |  |  |  |  |  |  | 1,429,000 |  |
Changes in fair value of warrants liability |  |  |  |  |  |  | $ 61,715 |  | $ 2,760,819 |  |
Number of shares issued upon warrants exercise |  |  |  |  |  |  | 271,972 |  |  |  |
Proceeds from warrants exercises |  |  |  |  |  |  | $ 2,123,425 |  |  |  |
Purchaser Warrant [Member] | Option Pricing Model [Member] |  |  |  |  |  |  |  |  |  |  |
Fair value expected term |  |  |  |  |  |  |  | 5 years |  |  |
Fair value expected volatility |  |  |  |  |  |  |  | 111.80% |  |  |
Fair value risk free interest rate |  |  |  |  |  |  |  | 2.37% |  |  |
Fair value expected dividend yield |  |  |  |  |  |  |  | 0.00% |  |  |
Initial Securities Purchase Agreement [Member] | Initial Purchasers [Member] |  |  |  |  |  |  |  |  |  |  |
Number of common shares issued |  |  | 130,000 | 200,000 |  |  |  |  |  |  |
Total consideration |  |  |  | $ 6,000,000 |  |  |  |  |  |  |
Initial Securities Purchase Agreement [Member] | Initial Purchasers [Member] | Warrant [Member] |  |  |  |  |  |  |  |  |  |  |
Warrants to purchase common stock |  |  |  | 160,000 |  |  |  |  |  |  |
Purchase Agreement [Member] | Purchasers [Member] |  |  |  |  |  |  |  |  |  |  |
Number of common shares issued |  | 20,017 |  |  |  |  |  |  |  |  |
Total consideration |  | $ 600,000 |  |  |  |  |  |  |  |  |
Initial price per share |  | $ 30 |  |  |  |  |  |  |  |  |
Purchase Agreement [Member] | Purchasers [Member] | Price Adjustment [Member] |  |  |  |  |  |  |  |  |  |  |
Initial price per share |  | $ 0.29 |  |  |  |  |  |  |  |  |
Share price adjustment, description |  | The per share purchase price (through the pre-funded Warrants) and Warrant exercise price was automatically adjusted lower (the "Price Adjustment") to 80% (with respect to the purchase price of the Common Stock) and 110% (with respect to the exercise price of the Warrants) of the lowest of the average daily prices on the 6 trading days following each of: (i) the date our stockholders approved the Private Placement transaction (such approval was obtained on September 27, 2018) and (ii) the date a registration statement covering the resale of securities being issued in the Private Placement was declared effective by the Securities and Exchange Commission (the "SEC") (such registration statement on Form S-1, file no. 333-227011, was declared effective on October 23, 2018 (the "Effective Registration")). |  |  |  |  |  |  |  |  |
Number of shares registered under effective registration as issued or issuable |  | 910,345 |  |  |  |  |  |  |  |  |
Number of shares issuable under purchaser warrants |  | 901,766 |  |  |  |  |  |  |  |  |
Purchase Agreement [Member] | Purchasers [Member] | Warrant [Member] |  |  |  |  |  |  |  |  |  |  |
Warrants to purchase common stock |  | 16,013 |  |  |  |  |  |  |  |  |
Warrant exercise price per share |  | $ 40 |  |  |  |  |  |  |  |  |
Purchase Agreement [Member] | Purchaser Warrant [Member] |  |  |  |  |  |  |  |  |  |  |
Warrants to purchase common stock |  |  |  |  |  |  |  | 176,013 |  |  |
Warrant exercise price per share |  |  |  |  |  |  |  | $ 40 |  |  |
Aggregate exercise price of warrants |  |  |  |  |  |  |  | $ 7,040,534 |  |  |
Beneficially owned equity percentage, description |  |  |  |  |  |  |  | Under the terms of all of the Warrants, a selling stockholder may not exercise Warrants to the extent such exercise would cause such selling stockholder, together with its affiliates and attribution parties, to beneficially own a number of shares of common stock which would exceed 4.99% or 9.99%, as applicable |  |  |
Exchange Agreements [Member] | Purchasers [Member] |  |  |  |  |  |  |  |  |  |  |
Number of common shares issued | 409,365 |  |  |  |  |  |  |  |  |  |
Changes in fair value of warrants liability | $ 733,470 |  |  |  |  |  |  |  |  |  |
Remaining warrant liability | $ 4,984,573 |  |  |  |  |  |  |  |  |  |
2018 Preferred Stock Amendment [Member] |  |  |  |  |  |  |  |  |  |  |
Warrant exercise price per share |  |  |  |  |  |  |  |  | $ 1.50 |  |
2018 Preferred Stock Amendment [Member] | Series A Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |
Number of common shares issued |  |  |  |  |  |  |  | 15,325 |  |  |
Warrants to purchase common stock |  |  |  |  |  |  |  |  |  |  | 200,000
Liquidation percentage |  |  |  |  |  |  |  |  |  | 2.00% |
Warrant desription |  |  |  |  |  |  |  | The Amendment Warrants are only exercisable for cash, with an exercise price of $1.50 per share, for five years from the date of issuance. In the event that the closing price of our common stock is $2.00 or higher for ten trading days out of a fifteen consecutive trading day period, the Company shall have the option, in its sole discretion, to elect to accelerate the termination date of the Amendment Warrants to such date that is 30 days (or more, in the Company's sole discretion) following the date of such election. |  |  |
2018 Preferred Stock Amendment [Member] | Series A Preferred Stock [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |
Voting power percentage |  |  |  |  |  |  |  |  |  |  | 70.00%

X
- Definition Beneficially owned equity percentage, description. + References No definition available. + Details
Name: | amrh_BeneficiallyOwnedEquityPercentageDescription
Namespace Prefix: | amrh_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value of warrant liability. + References No definition available. + Details
Name: | amrh_FairValueOfWarrantLiability
Namespace Prefix: | amrh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition This element represents percentage of the liquidation preference per annum. + References No definition available. + Details
Name: | amrh_LiquidationPercentage
Namespace Prefix: | amrh_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares issued upon warrants exercise. + References No definition available. + Details
Name: | amrh_NumberOfSharesIssuedUponWarrantsExercise
Namespace Prefix: | amrh_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares registered under the securities after the registration becomes effective. + References No definition available. + Details
Name: | amrh_NumberOfSharesRegisteredUnderEffectiveRegistrationAsIssuedOrIssuable
Namespace Prefix: | amrh_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares registered under the securities purchaser warrant agreement. + References No definition available. + Details
Name: | amrh_Numberofsharesissuableunderpurchaserwarrants
Namespace Prefix: | amrh_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Remaining warrant liability. + References No definition available. + Details
Name: | amrh_RemainingWarrantLiability
Namespace Prefix: | amrh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Share price adjustment, description. + References No definition available. + Details
Name: | amrh_SharePriceAdjustmentDescription
Namespace Prefix: | amrh_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
Name: | us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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=109259400&loc=d3e21475-112644 + Details
Name: | us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Description of expense or revenue offset related to the warrants or rights. + References No definition available. + Details
Name: | us-gaap_ClassOfWarrantOrRightExpenseOrRevenueRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares. + 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=109259400&loc=d3e21475-112644 + Details
Name: | us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of expense (income) related to adjustment to fair value of warrant liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section 25 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=109262497&loc=d3e20148-110875 + Details
Name: | us-gaap_FairValueAdjustmentOfWarrants
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash inflow associated with the amount received from entity's raising of capital via private rather than public placement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromIssuanceOfPrivatePlacement
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash inflow associated with the amount received from holders exercising their stock warrants. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromWarrantExercises
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iv) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.D.2) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Per share or per unit amount of equity securities issued. + References No definition available. + Details
Name: | us-gaap_SharesIssuedPricePerShare
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of new stock issued during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Value of outstanding derivative securities that permit the holder the right to purchase securities (usually equity) from the issuer at a specified price. + References No definition available. + Details
Name: | us-gaap_WarrantsAndRightsOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesAPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=amrh_AmendmentWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ValuationTechniqueAxis=us-gaap_ValuationTechniqueOptionPricingModelMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_TitleOfIndividualAxis=amrh_PurchaserWarrantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=amrh_InitialSecuritiesPurchaseAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_TitleOfIndividualAxis=amrh_InitialPurchasersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_WarrantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=amrh_PurchaseAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_TitleOfIndividualAxis=amrh_PurchasersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=amrh_ExchangeAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=amrh_TwoThousandAndEighteenPreferredStockAmendmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |