Note 16 - Defined Contribution Retirement Plan (Details Textual)	12 Months Ended
Mar. 31, 2016 USD ($)	Mar. 31, 2015 USD ($)
Defined Contribution Plan, Service Period for Eligibility	1 year
Defined Contribution Plan, Employee, Eligible Age	18
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	3.00%
Defined Contribution Plan, Cost Recognized	$ 120,862	$ 85,916

Represents the age of eligibility for employees under a defined contribution plan.

No definition available.

Name:	hbk_DefinedContributionPlanEmployeeEligibleAge
Namespace Prefix:	hbk_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the service period for eligibility under a defined contribution plan.

+ References

No definition available.

+ Details

Name:	hbk_DefinedContributionPlanServicePeriodForEligibility
Namespace Prefix:	hbk_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of the cost recognized during the period for defined contribution plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

+ Details

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

- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration