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Borrowings from Officer (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Feb. 06, 2014
Feb. 05, 2015
Borrowing from Officer        
Loan payable to officer $ 1,530,000us-gaap_NotesPayableRelatedPartiesNoncurrent $ 1,530,000us-gaap_NotesPayableRelatedPartiesNoncurrent    
Accrued interest, related party 76,000us-gaap_InterestPayableCurrent 76,000us-gaap_InterestPayableCurrent    
G. Ward Paxton, chief executive officer | Promissory note        
Borrowing from Officer        
Maximum borrowing capacity 2,200,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ChiefExecutiveOfficerMember
  2,200,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ChiefExecutiveOfficerMember
 
Finance charge basis prime rate      
Percentage points added in interest rate 1.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ChiefExecutiveOfficerMember
     
Interest rate (as a percent) 5.00%us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ChiefExecutiveOfficerMember
     
Loan payable to officer 1,530,000us-gaap_NotesPayableRelatedPartiesNoncurrent
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ChiefExecutiveOfficerMember
     
Accrued interest, related party 76,500us-gaap_InterestPayableCurrent
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ChiefExecutiveOfficerMember
     
G. Ward Paxton, chief executive officer | Promissory note | Subsequent event        
Borrowing from Officer        
Maximum borrowing capacity       $ 2,200,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ChiefExecutiveOfficerMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember