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Stock Options - Summary of Stock Options Activity (Details) - $ / shares
12 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]    
Number of Shares Outstanding, Beginning Balance 149,600 153,600
Number of Shares Outstanding, Granted
Number of Shares Outstanding, Exercised
Number of Shares Outstanding, Forfeited or Expired (1,000) (4,000)
Number of Shares Outstanding, Ending Balance 148,600 149,600
Number of Shares Outstanding, Vested 138,600  
Number of Shares Outstanding, Exercisable 138,600  
Weighted Average Exercise Price, Beginning Balance $ 6.54 $ 6.52
Weighted Average Exercise Price, Granted
Weighted Average Exercise Price, Exercised
Weighted Average Exercise Price, Forfeited or Expired 5.98 5.98
Weighted Average Exercise Price, Ending Balance 6.54 $ 6.54
Weighted Average Exercise Price, Vested 6.51  
Weighted Average Exercise Price, Exercisable $ 6.51  
Weighted Average Remaining Contract Life in Years, Beginning Balance 5 years 4 months 2 days 6 years 4 months 9 days
Weighted Average Remaining Contract Life in Years, Ending Balance 4 years 4 months 2 days 5 years 4 months 2 days
Weighted Average Remaining Contract Life in Years, Vested 4 years 2 months 8 days  
Weighted Average Remaining Contract Life in Years, Exercisable 4 years 2 months 8 days