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

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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

- Definition

Date the debt agreement requires the first payment, principal 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
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- Definition

Debt instrument redemption price percentage on change of control.

+ References

No definition available.

+ Details

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Namespace Prefix:	qtnt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

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Namespace Prefix:	qtnt_
Data Type:	num: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:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

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-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

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

+ 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 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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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

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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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph e
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

+ Details

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Data Type:	num: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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
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-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

+ Details

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Data Type:	xbrli:stringItemType
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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

- 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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-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SecuredDebtMember
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Balance Type:
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- Details

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Name:	srt_RangeAxis=srt_MaximumMember
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Debt - Additional Information (Detail) - Secured Notes [Member] - USD ($)				9 Months Ended
	Jan. 15, 2019	Dec. 18, 2018	Oct. 14, 2016	Dec. 31, 2018	Jun. 29, 2018
Debt Instrument [Line Items]
Debt instrument, issuance date				Oct. 14, 2016
Aggregate principal amount of notes issued			$ 84,000,000
Aggregate principal additional amount of notes issued					$ 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				100.00%
Payment to cash reserve account held by collateral agent				$ 7,200,000	$ 2,200,000
Debt instrument date of first required payment, interest			Apr. 15, 2017
Debt instrument date of first required payment, principal			Apr. 15, 2021
Debt instrument, interest rate				12.00%
MosaiQ [Member]
Debt Instrument [Line Items]
Debt instrument subscribers rights to receive payment as percentage of net MosaiQ sales		3.00%	2.00%	3.00%
Subsequent Event [Member]
Debt Instrument [Line Items]
Aggregate principal additional amount of notes issued	$ 25,000,000
Subsequent Event [Member] \| MosaiQ [Member]
Debt Instrument [Line Items]
Debt instrument subscribers rights to receive as additional percentage of net MosaiQ sales	0.40%
Maximum [Member]
Debt Instrument [Line Items]
Aggregate principal amount of notes issued		$ 145,000,000	$ 120,000,000