Debt instrument interest only payment extended period.

No definition available.

Name:	htgm_DebtInstrumentInterestOnlyPaymentExtendedPeriod
Namespace Prefix:	htgm_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Down payment on insurance note.

+ References

No definition available.

+ Details

Name:	htgm_DownPaymentOnInsuranceNote
Namespace Prefix:	htgm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Loan prepayment penalties.

+ References

No definition available.

+ Details

Name:	htgm_LoanPrepaymentPenalties
Namespace Prefix:	htgm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Premium payable on insurance note.

+ References

No definition available.

+ Details

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Namespace Prefix:	htgm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

+ References

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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- 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

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Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- 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

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the debt agreement requires the first payment to be made, in CCYY-MM-DD format.

+ References

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Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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-Name Accounting Standards Codification
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+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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+ Details

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Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of unamortized debt discount (premium) and debt issuance costs.

+ References

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-Name Accounting Standards Codification
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of expense (income) related to adjustment to fair value of warrant liability.

+ References

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow from bank borrowing during the year.

+ References

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Expiration date 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 CCYY-MM-DD format.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
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- Details

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- Details

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- Details

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- Details

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Namespace Prefix:
Data Type:	na
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- Details

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- Details

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Debt Obligations - Additional Information (Details) - USD ($)				3 Months Ended
	Jun. 24, 2020	Apr. 27, 2020	Apr. 21, 2020	Mar. 31, 2021
Insurance Note
Debt Instrument [Line Items]
Debt instrument, interest rate		3.61%
Debt instrument, maturity date		Feb. 28, 2021
Loan term		9 months
Down payment on insurance note		$ 200,000
Premium payable on insurance note		$ 700,000
SVB Term Loan
Debt Instrument [Line Items]
Debt instrument, principal amount	$ 10,000,000
Debt instrument, interest rate	5.75%
Extend the interest-only payments	6 months
Debt instrument, maturity date	Dec. 01, 2023
Warrant to purchase common stock, shares	42,894
Warrant purchase price	$ 11.6565			$ 11.6565
Warrant expiration date	Jun. 24, 2030
Fair value of warrants	$ 400,000
Debt instrument, amortization expense				$ 100,000
Debt discount, fees and debt issuance costs				$ 968,642
SVB Term Loan \| Prime Rate \| Minimum
Debt Instrument [Line Items]
Debt instrument, interest at floating rate	2.50%
Paycheck Protection Program Loan
Debt Instrument [Line Items]
Debt instrument, interest rate			1.00%
Debt instrument, maturity date			Apr. 21, 2022
Loan repayment start date			Sep. 21, 2021
Loan term			8 months
Loan prepayment penalties			$ 0
Paycheck Protection Program Loan \| Silicon Valley Bank
Debt Instrument [Line Items]
Proceeds from Paycheck Protection Program Loan			$ 1,700,000