Debt instrument additional face amount.

No definition available.

Name:	XTNT_DebtInstrumentAdditionalFaceAmount
Namespace Prefix:	XTNT_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Right offering expired date.

+ References

No definition available.

+ Details

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

- Definition

The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
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-Topic 230
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586

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

- Definition

The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 5
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-URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586

+ Details

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Namespace Prefix:	us-gaap_
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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

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

- 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:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Per share or per unit amount of equity securities issued.

+ References

No definition available.

+ Details

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

- 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
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+ Details

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

- Definition

Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.

+ References

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-Publisher FASB
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Balance Type:	credit
Period Type:	duration

- Details

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Balance Type:
Period Type:

- Details

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Period Type:

- Details

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Period Type:

Equity (Details Narrative) - USD ($)					3 Months Ended
Equity (Details Narrative) - USD ($)	May 18, 2018	Feb. 14, 2018	Feb. 14, 2018	Jan. 17, 2018	Mar. 31, 2019	Mar. 31, 2018
Schedule of Equity Method Investments [Line Items]
Debt conversion of convertible debt						$ 71,865,000
Stock issued during period, shares, new issues	129
Shares issued, price per share	$ 0.0869816
Stock issued during period, value, new issues	$ 900,000					$ 79,198,000
Share price	$ 7.20
Right offering expired date	Jun. 18, 2018
Maximum [Member]
Schedule of Equity Method Investments [Line Items]
Stock issued during period, shares, new issues	1,137,515
Private Placement SPA [Member]
Schedule of Equity Method Investments [Line Items]
Stock issued during period, shares, new issues		945,819
Shares issued, price per share		$ 7.20	$ 7.20
Stock issued during period, value, new issues		$ 6,800,000
6.00% Convertible Senior Unsecured Notes [Member]
Schedule of Equity Method Investments [Line Items]
Debt instrument due date description			Convertible senior unsecured notes due 2021	Convertible senior unsecured notes due 2021		All of the outstanding 6.00% convertible senior unsecured notes due 2021
Debt conversion of convertible debt			$ 70,300,000	$ 1,600,000
Debt conversion, converted instrument, shares issued		10,401,309	10,401,309	189,645
Additional debt principal amount		$ 70,300,000	$ 70,300,000