<?xml version="1.0" encoding="utf-8"?>
<FilingSummary xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <Version>2.4.1.9</Version>
  <ProcessingTime />
  <ReportFormat>Html</ReportFormat>
  <ContextCount>54</ContextCount>
  <ElementCount>227</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>20</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>5</UnitCount>
  <MyReports>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>00000001 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/DocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
    </Report>
    <Report>
      <IsDefault>true</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>00000002 - Statement - Balance Sheet (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/BalanceSheet</Role>
      <ShortName>Balance Sheet (Unaudited)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>00000003 - Statement - Balance Sheet (Unaudited) (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/BalanceSheetParenthetical</Role>
      <ShortName>Balance Sheet (Unaudited) (Parenthetical)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>00000004 - Statement - Statement of Operations (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/StatementOfOperations</Role>
      <ShortName>Statement of Operations (Unaudited)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>00000005 - Statement - Statement of Changes in Stockholders' Equity (Deficit)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/StatementOfChangesInStockholdersEquityDeficit</Role>
      <ShortName>Statement of Changes in Stockholders' Equity (Deficit)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>00000006 - Statement - Statement of Cash Flows (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/StatementOfCashFlows</Role>
      <ShortName>Statement of Cash Flows (Unaudited)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>00000007 - Disclosure - 1. GENERAL ORGANIZATION AND BUSINESS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/GeneralOrganizationAndBusiness</Role>
      <ShortName>1. GENERAL ORGANIZATION AND BUSINESS</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>00000008 - Disclosure - 2. SUMMARY OF SIGNIFICANT ACCOUNTING PRACTICES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/SummaryOfSignificantAccountingPractices</Role>
      <ShortName>2. SUMMARY OF SIGNIFICANT ACCOUNTING PRACTICES</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>00000009 - Disclosure - 3. INVENTORIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/Inventories</Role>
      <ShortName>3. INVENTORIES</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>00000010 - Disclosure - 4. ACCRUED EXPENSES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/AccruedExpenses</Role>
      <ShortName>4. ACCRUED EXPENSES</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>00000011 - Disclosure - 5. STOCKHOLDERS' EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/StockholdersEquity</Role>
      <ShortName>5. STOCKHOLDERS' EQUITY</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>00000012 - Disclosure - 6. STOCK OPTION PLAN AND STOCK-BASED COMPENSATION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/StockOptionPlanAndStock-basedCompensation</Role>
      <ShortName>6. STOCK OPTION PLAN AND STOCK-BASED COMPENSATION</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>00000013 - Disclosure - 7. RELATED PARTY TRANSACTIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/RelatedPartyTransactions</Role>
      <ShortName>7. RELATED PARTY TRANSACTIONS</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>00000014 - Disclosure - 8. INTANGIBLE ASSETS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/IntangibleAssets</Role>
      <ShortName>8. INTANGIBLE ASSETS</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>00000015 - Disclosure - 9. PROVISION FOR INCOME TAXES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/ProvisionForIncomeTaxes</Role>
      <ShortName>9. PROVISION FOR INCOME TAXES</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>00000016 - Disclosure - 10. COMMITMENTS AND CONTINGENCIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/CommitmentsAndContingencies</Role>
      <ShortName>10. COMMITMENTS AND CONTINGENCIES</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>00000017 - Disclosure - 11. SUBSEQUENT EVENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/SubsequentEvents</Role>
      <ShortName>11. SUBSEQUENT EVENTS</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>00000018 - Disclosure - 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/SummaryOfSignificantAccountingPoliciesPolicies</Role>
      <ShortName>2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>00000019 - Disclosure - 2. SUMMARY OF SIGNIFICANT ACCOUNTING PRACTICES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/SummaryOfSignificantAccountingPracticesTables</Role>
      <ShortName>2. SUMMARY OF SIGNIFICANT ACCOUNTING PRACTICES (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>00000020 - Disclosure - 3. INVENTORIES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/InventoriesTables</Role>
      <ShortName>3. INVENTORIES (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>00000021 - Disclosure - 4. ACCRUED EXPENSES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/AccruedExpensesTables</Role>
      <ShortName>4. ACCRUED EXPENSES (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>00000022 - Disclosure - 5. STOCKHOLDERS' EQUITY (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/StockholdersEquityTables</Role>
      <ShortName>5. STOCKHOLDERS' EQUITY (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>00000023 - Disclosure - 6. STOCK OPTION PLAN AND STOCK-BASED COMPENSATION (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/StockOptionPlanAndStock-basedCompensationTables</Role>
      <ShortName>6. STOCK OPTION PLAN AND STOCK-BASED COMPENSATION (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>00000024 - Disclosure - 8. INTANGIBLE ASSETS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/IntangibleAssetsTables</Role>
      <ShortName>8. INTANGIBLE ASSETS (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>00000025 - Disclosure - 9. PROVISION FOR INCOME TAXES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/ProvisionForIncomeTaxesTables</Role>
      <ShortName>9. PROVISION FOR INCOME TAXES (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>00000026 - Disclosure - 10. COMMITMENTS AND CONTINGENCIES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/CommitmentsAndContingenciesTables</Role>
      <ShortName>10. COMMITMENTS AND CONTINGENCIES (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>00000027 - Disclosure - 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/SummaryOfSignificantAccountingPoliciesDetailsNarrative</Role>
      <ShortName>2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Narrative)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>00000028 - Disclosure - 2. SUMMARY OF SIGNIFICANT ACCOUNTING PRACTICES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/SummaryOfSignificantAccountingPracticesDetails</Role>
      <ShortName>2. SUMMARY OF SIGNIFICANT ACCOUNTING PRACTICES (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>00000029 - Disclosure - 3. INVENTORIES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/InventoriesDetails</Role>
      <ShortName>3. INVENTORIES (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>00000030 - Disclosure - 4. ACCRUED EXPENSES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/AccruedExpensesDetails</Role>
      <ShortName>4. ACCRUED EXPENSES (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>00000031 - Disclosure - 6. STOCK OPTION PLAN AND STOCK-BASED COMPENSATION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/StockOptionPlanAndStock-basedCompensationDetails</Role>
      <ShortName>6. STOCK OPTION PLAN AND STOCK-BASED COMPENSATION (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>00000032 - Disclosure - 6. STOCK OPTION PLAN AND STOCK-BASED COMPENSATION (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/StockOptionPlanAndStock-basedCompensationDetails1</Role>
      <ShortName>6. STOCK OPTION PLAN AND STOCK-BASED COMPENSATION (Details 1)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>00000033 - Disclosure - 6. STOCK OPTION PLAN AND STOCK-BASED COMPENSATION (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/StockOptionPlanAndStock-basedCompensationDetails2</Role>
      <ShortName>6. STOCK OPTION PLAN AND STOCK-BASED COMPENSATION (Details 2)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>00000034 - Disclosure - 6. STOCK OPTION PLAN AND STOCK-BASED COMPENSATION (Details 3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/StockOptionPlanAndStock-basedCompensationDetails3</Role>
      <ShortName>6. STOCK OPTION PLAN AND STOCK-BASED COMPENSATION (Details 3)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>00000035 - Disclosure - 6. STOCK OPTION PLAN AND STOCK-BASED COMPENSATION (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/StockOptionPlanAndStock-basedCompensationDetailsNarrative</Role>
      <ShortName>6. STOCK OPTION PLAN AND STOCK-BASED COMPENSATION (Details Narrative)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>00000036 - Disclosure - 7. RELATED PARTY TRANSACTIONS (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/RelatedPartyTransactionsDetailsNarrative</Role>
      <ShortName>7. RELATED PARTY TRANSACTIONS (Details Narrative)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>00000037 - Disclosure - 8. INTANGIBLE ASSETS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/IntangibleAssetsDetails</Role>
      <ShortName>8. INTANGIBLE ASSETS (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>00000038 - Disclosure - 8. INTANGIBLE ASSETS (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/IntangibleAssetsDetails1</Role>
      <ShortName>8. INTANGIBLE ASSETS (Details 1)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>00000039 - Disclosure - 8. INTANGIBLE ASSETS (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/IntangibleAssetsDetailsNarrative</Role>
      <ShortName>8. INTANGIBLE ASSETS (Details Narrative)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>00000040 - Disclosure - 9. PROVISION FOR INCOME TAXES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/ProvisionForIncomeTaxesDetails</Role>
      <ShortName>9. PROVISION FOR INCOME TAXES (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>00000041 - Disclosure - 9. PROVISION FOR INCOME TAXES (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/ProvisionForIncomeTaxesDetails1</Role>
      <ShortName>9. PROVISION FOR INCOME TAXES (Details 1)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>00000042 - Disclosure - 10. COMMITMENTS AND CONTINGENCIES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/CommitmentsAndContingenciesDetails</Role>
      <ShortName>10. COMMITMENTS AND CONTINGENCIES (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>00000043 - Disclosure - 10. COMMITMENTS AND CONTINGENCIES (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://bostonti.com/role/CommitmentsAndContingenciesDetailsNarrative</Role>
      <ShortName>10. COMMITMENTS AND CONTINGENCIES (Details Narrative)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <Logs>
    <Log type="Info">Process Flow-Through: 00000002 - Statement - Balance Sheet (Unaudited)</Log>
    <Log type="Info">	Process Flow-Through: Removing column 'Dec. 31, 2012'</Log>
    <Log type="Info">Process Flow-Through: 00000003 - Statement - Balance Sheet (Unaudited) (Parenthetical)</Log>
    <Log type="Info">Process Flow-Through: 00000004 - Statement - Statement of Operations (Unaudited)</Log>
    <Log type="Info">Process Flow-Through: 00000006 - Statement - Statement of Cash Flows (Unaudited)</Log>
  </Logs>
  <InputFiles>
    <File>bthe-20141231.xml</File>
    <File>bthe-20141231.xsd</File>
    <File>bthe-20141231_cal.xml</File>
    <File>bthe-20141231_def.xml</File>
    <File>bthe-20141231_lab.xml</File>
    <File>bthe-20141231_pre.xml</File>
  </InputFiles>
  <SupplementalFiles />
  <BaseTaxonomies />
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
