Name:	hall_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostExpectedToRecognizeDuringRemainderOfNextTwelveMonths
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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

No definition available.

Name:	hall_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostExpectedToRecognizeDuringRemainderOfYearFour
Namespace Prefix:	hall_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

No definition available.

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

No definition available.

Name:	hall_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostExpectedToRecognizeDuringRemainderOfYearTwo
Namespace Prefix:	hall_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The number of shares (or other type of equity)which are qualified stock options to purchase under the plan.

No definition available.

Name:	hall_ShareBasedCompensationArrangementByShareBasedPaymentAwardIncentiveStockOptionsToPurchaseNumberOfShares
Namespace Prefix:	hall_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

The number of shares (or other type of equity) which are non-qualified options to purchase under the plan.

No definition available.

Name:	hall_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonQualifiedStockOptionsToPurchaseNumberOfShares
Namespace Prefix:	hall_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

The number of shares into which fully vested and expected to vest stock options outstanding can be converted under the option plan.

No definition available.

Name:	hall_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestNumber
Namespace Prefix:	hall_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

The percentage of number of exercisable share options (fully vested and expected to vest) that may be converted as of the balance sheet date.

No definition available.

Name:	hall_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestPercentage
Namespace Prefix:	hall_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

The termination period of incentive stock options granted under incentive plan.

No definition available.

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Namespace Prefix:	hall_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Aggregate number of common shares reserved for future issuance.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.29)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (i)

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

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph h

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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Description of award terms as to how many shares or portion of an award are no longer contingent on satisfaction of either a service condition, market condition or a performance condition, thereby giving the employee the legal right to convert the award to shares, to sell the shares, and be entitled to the cash proceeds of such sale. For example, vesting may be expressed as being 25 percent of the shares under option on each anniversary of the grant 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 (a)(1)

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

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(3)

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