Stock Options - Summary information about options outstanding at March 31, 2013 (Details) (USD $)	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2010
Number of options outstanding	80,000	83,750	53,750	107,500
Weighted Average Exercise Price Per Share	$ 6.52	$ 6.42	$ 5.69	$ 5.94
Weighted Average Remaining Contract Life in Years	8 years 237 days	7 years 121 days	2 years 186 days
Aggregate Intrinsic Value		$ 127,363	$ 401,200	$ 237,088
Exercise Prices 6.00 – 6.29
Number of options outstanding	40,000
Weighted Average Exercise Price Per Share	$ 6.23
Exercise Prices 6.30 – 6.80
Number of options outstanding	40,000
Weighted Average Exercise Price Per Share	$ 6.80
Exercise Prices 6.00 – 6.29 total
Number of options outstanding	80,000
Weighted Average Exercise Price Per Share	$ 6.52
Weighted Average Remaining Contract Life in Years	8 years 11 days
Aggregate Intrinsic Value