Coupon interest.

No definition available.

Name:	qtnt_CouponInterest
Namespace Prefix:	qtnt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Debt instrument date of first payment principal.

+ References

No definition available.

+ Details

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Namespace Prefix:	qtnt_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

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Namespace Prefix:	qtnt_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt instrument indenture date.

+ References

No definition available.

+ Details

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Namespace Prefix:	qtnt_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt instrument, percentage of repurchase price on certain asset sales.

+ References

No definition available.

+ Details

Name:	qtnt_DebtInstrumentPercentageOfRepurchasePriceOnCertainAssetSales
Namespace Prefix:	qtnt_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt instrument principal payment.

+ References

No definition available.

+ Details

Name:	qtnt_DebtInstrumentPrincipalPayment
Namespace Prefix:	qtnt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Debt instrument redemption price percentage on change of control.

+ References

No definition available.

+ Details

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Namespace Prefix:	qtnt_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt instrument subscribers right to receive payment as percentage of net sales.

+ References

No definition available.

+ Details

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Namespace Prefix:	qtnt_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Issuance costs attributable to bifurcated derivative.

+ References

No definition available.

+ Details

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Namespace Prefix:	qtnt_
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Balance Type:	debit
Period Type:	instant

- Definition

Amount of amortization expense attributable to debt issuance costs.

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

- Definition

Face amount per share of no-par value common stock.

+ References

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

+ References

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

The price per share of the conversion feature embedded in the debt instrument.

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Period Type:	instant

- Definition

Description of conversion terms for debt instrument.

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Period Type:	duration

- Definition

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

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

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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

- Definition

Date the debt instrument was issued, in YYYY-MM-DD format.

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

- 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 YYYY-MM-DD format.

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+ Details

Name:	us-gaap_DebtInstrumentMaturityDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of the maturity date of the debt instrument including whether the debt matures serially and, if so, a brief description of the serial maturities.

+ References

+ Details

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

- Definition

Amount of the required periodic payments including both interest and principal payments.

+ References

+ Details

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

- Definition

Description of debt redemption features under terms of the debt agreement.

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+ Details

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

- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

+ Details

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

- Definition

Description of covenants that limit or prohibit certain actions or activities without the lender's prior consent within a specified period of time or until certain specified targets are achieved for example, reduction of the debt or an increase in net worth to a specified amount).

+ References

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Name:	us-gaap_DebtInstrumentRestrictiveCovenants
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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

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

- Definition

Description of unused borrowing capacity under the debt instrument and conditions under which the commitment can be withdrawn by the lender.

+ References

+ Details

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

- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Name:	us-gaap_DeferredFinanceCostsNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The designation of funds furnished by a borrower to a lender to assure future payments of the borrower's real estate taxes and insurance obligations with respect to a mortgaged property. Escrow deposits may be made for a variety of other purposes such as earnest money and contingent payments. This element excludes replacement reserves which are an escrow separately provided for within the US GAAP taxonomy.

+ References

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

- Definition

Amount of the cost of borrowed funds accounted for as interest expense for debt.

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Namespace Prefix:	us-gaap_
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- Definition

Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

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- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

+ Details

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Balance Type:	credit
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- Definition

The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

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

- Definition

The amount the entity has committed to make for future royalty guarantees.

+ References

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

- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

No definition available.

+ Details

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

- Definition

Number of shares issued during the period as a result of the conversion of convertible securities.

+ References

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Debt - Additional Information (Detail) - USD ($)							12 Months Ended
Debt - Additional Information (Detail) - USD ($)	Oct. 13, 2021	Jun. 02, 2021	May 26, 2021	Apr. 15, 2021	May 15, 2019	Jun. 29, 2018	Mar. 31, 2022	Mar. 31, 2021	Oct. 14, 2016
Debt Instrument [Line Items]
Current portion of long-term debt							$ 0	$ 24,167,000
Ordinary shares, shares issued							102,611,397	101,264,412
Ordinary shares, par value
Accrued interest							$ 9,235,000	$ 8,009,000
Common Stock [Member]
Debt Instrument [Line Items]
Ordinary shares, shares issued							102,611,397	101,264,412
Ordinary shares, par value
Convertible Notes [Member]
Debt Instrument [Line Items]
Debt instrument, issuance date							May 26, 2021
Aggregate principal amount of notes issued		$ 10,000,000.0	$ 95,000,000.0
Debt instrument, interest rate							4.75%
Maturity date		May 26, 2026
Debt instrument, conversion, description							At any time before the close of business on the second business day immediately before the maturity date, holders of the Convertible Notes can convert the Convertible Notes either in whole or in part into the Company’s ordinary shares at an initial conversion rate of 176.3668 ordinary shares per $1,000 principal amount of the Convertible Notes, subject to customary anti-dilution adjustments.
Conversion rate of ordinary shares			176.3668
Conversion price per share			$ 1,000
Debt issuance costs			$ 3,700,000				$ 3,180,000
Issuance costs attributable to bifurcated derivative			$ 0
Expected life of debt			5 years
Debt instrument, effective interest rate			12.90%
Interest expense debt							8,500,000
Coupon interest							4,200,000
Amortization of debt discount and issuance costs							4,300,000
Convertible Notes [Member] \| Accrued Expenses And Other Current Liabilities [Member]
Debt Instrument [Line Items]
Accrued interest							$ 1,900,000
Secured Notes [Member]
Debt Instrument [Line Items]
Debt instrument, issuance date							Oct. 14, 2016
Aggregate principal amount of notes available for issue									$ 84,000,000
Aggregate principal amount of notes issued					$ 25	$ 36,000,000
Debt instrument, unused/additional borrowing capacity							The Company issued $84 million aggregate principal amount of the Secured Notes on October 14, 2016 and an additional $36 million aggregate principal amount of the Secured Notes on June 29, 2018.
Debt instrument, restrictive covenants							The Company and its subsidiaries must also comply with certain customary affirmative and negative covenants, including a requirement to maintain six-months of interest in a cash reserve account maintained with the collateral agent. Upon the occurrence of a Change of Control, subject to certain conditions, or certain Asset Sales (each, as defined in the indenture), holders of the Secured Notes may require the Company to repurchase for cash all or part of their Secured Notes at a repurchase price equal to 101% or 100%, respectively, of the principal amount of the Secured Notes to be repurchased, plus accrued and unpaid interest to the date of repurchase.
Debt instrument, percentage of repurchase price on change of control							101.00%
Debt instrument, percentage of repurchase price on certain asset sales							100.00%
Payment to cash reserve account held by collateral agent				$ 8,000,000.0	8,700,000
Debt instrument date of first required payment, interest							Apr. 15, 2017
Debt instrument date of first payment, principal							Apr. 15, 2021
Debt instrument, interest rate				12.00%			12.00%	12.00%
Debt instrument principal payment				$ 12,100,000
Debt instrument indenture date	Oct. 14, 2016
Debt instrument, maturity date, description							The Indenture Amendments include an 18-month extension of the final maturity of the Secured Notes to October 15, 2025 and a revision of the Notes’ principal amortization schedule (which previously required semi-annual payments of principal beginning April 2021) to commence April 2023. The revised amortization schedule will defer approximately $60 million of principal payments previously required to be made between April 2021 and April 2023.
Revised amortization principal payments							$ 60,000,000
Debt instrument, redemption, description							The Secured Notes may be redeemed from and after October 14, 2021 at redemption prices beginning at 106% of par and declining over time to 100.0% for redemptions occurring from and after April 14, 2024.
Secured Notes [Member] \| Debt Instrument, Redemption, Period One [Member]
Debt Instrument [Line Items]
Debt instrument, redemption percentage							106.00%
Secured Notes [Member] \| Debt Instrument, Redemption, Period Two [Member]
Debt Instrument [Line Items]
Debt instrument, redemption percentage							100.00%
Secured Notes [Member] \| Third Issuance [Member]
Debt Instrument [Line Items]
Payment to cash reserve account held by collateral agent					1,500,000
Secured Notes [Member] \| Fourth Supplemental Indenture [Member]
Debt Instrument [Line Items]
Debt instrument indenture date	Oct. 13, 2021
Secured Notes [Member] \| Consent Shares [Member] \| Common Stock [Member]
Debt Instrument [Line Items]
Ordinary shares, shares issued							932,772
Ordinary shares, par value							$ 0
Secured Notes [Member] \| Consent Warrants [Member] \| Common Stock [Member]
Debt Instrument [Line Items]
Ordinary shares, shares issued							1,844,020
Warrants duration							5 years
Par value per share							$ 4
Secured Notes [Member] \| MosaiQ [Member]
Debt Instrument [Line Items]
Debt instrument subscribers rights to receive payment as percentage of net MosaiQ sales							3.40%
Estimated amount under royalty agreement							$ 76,800,000	$ 106,500,000
Secured Notes [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Aggregate principal amount of notes available for issue					$ 145,000,000	$ 120,000,000			$ 120,000,000