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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that exercised.

No definition available.

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

No definition available.

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The increase in number of shares reserved for stock spilt and change in plan under stock option agreements awarded under the plan that validly exist and are outstanding, including vested options.

No definition available.

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Gross number of share options (or share units) granted during the period.

No definition available.

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Weighted average price of options that were either forfeited or exercised.

No definition available.

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No definition available.

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Data Type:	xbrli:sharesItemType
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The increase in number of shares for reverse spilt and change in plan under stock option agreements awarded under the plan that validly exist and are outstanding, including vested options.

No definition available.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan for reverse spilt and change in plan.

No definition available.

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Exercise price at which grantees can acquire the shares reserved for issuance under other than stock option plan.

No definition available.

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Data Type:	num:perShareItemType
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Period Type:	instant

Weighted average price at which grantees can acquire the shares reserved for issuance under other than stock option plan.

No definition available.

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Exercise price at which option holders acquired shares when converting other than stock options into shares.

No definition available.

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Weighted average price at which option holders acquired shares when converting other than stock options into shares.

No definition available.

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Data Type:	num:perShareItemType
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Exercise price at which option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

No definition available.

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Weighted average price at which option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

No definition available.

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Exercise price at which grantees can acquire the shares reserved for issuance on other than stock options awarded.

No definition available.

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Weighted average price at which grantees can acquire the shares reserved for issuance on other than stock options awarded.

No definition available.

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Data Type:	num:perShareItemType
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Exercise price at which option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

No definition available.

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Data Type:	num:perShareItemType
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Weighted average price at which option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

No definition available.

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Namespace Prefix:	btx_
Data Type:	num:perShareItemType
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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iv)(3)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Data Type:	xbrli:stringItemType
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Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Gross number of share options (or share units) granted during the period.

No definition available.

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Namespace Prefix:	us-gaap_
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Number of options outstanding, including both vested and non-vested options.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

No definition available.

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Data Type:	num:perShareItemType
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