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Long-Term Debt (Parenthetical) (Detail) - Mortgage payable to bank
$ in Thousands
12 Months Ended
Feb. 28, 2018
USD ($)
Debt Instrument [Line Items]  
Debt Instrument, interest rate terms Mortgage payable to bank; interest rate at BB&T Bank base rate plus 0.5% (5.00% as of February 28, 2018); monthly principal and interest payments of $5 thousand payable through October 2021; collateralized by land and building of Teltron Technologies, Inc.
Combined rate 5.00%
Mortgage Payable to bank monthly principal and interest payments payable $ 5
Debt Instrument Maturity period 2021-10
Base Rate  
Debt Instrument [Line Items]  
Interest rate 0.50%