4. Stock-based Compensation (Details) - 3 months ended Jun. 30, 2015 - USD ($) None in scaling factor is -9223372036854775296	Total
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Shares outstanding, beginning	153,600
Number of shares granted
Number of shares exercised
Shares forfeited or expired
Shares outstanding, end	153,600
Options Vested	86,100
Options Exercisable	86,100
Options Outstanding, Weighted Average Exercise Price Per Share, beginning	$ 6.52
Options Outstanding, Weighted Average Exercise Price Per Share, end	$ 6.52
Options Outstanding, Weighted Aggregate Average Remaining Contract Life in Years	7 years 4 months 9 days
Options Outstanding, Intrinsic Value, beginning
Options Outstanding, Intrinsic Value, end
Options Granted, Weighted Average Exercise Price Per Share
Options Exercised, Weighted Average Exercise Price Per Share
Options Forfeited or Expired, Weighted Average Exercise Price Per Share
Options Vested, Weighted Average Exercise Price Per Share	$ 6.38
Options Vested, Weighted Aggregate Average Remaining Contract Life in Years	6 years 1 month 16 days
Options Vested, Intrinsic Value
Options Exercisable, Weighted Average Exercise Price Per Share	$ 6.38
Options Exercisable, Weighted Aggregate Average Remaining Contract Life in Years	6 years 1 month 16 days
Options Exercisable, Intrinsic Value