Stock-based Compensation - Options outstanding (Details) (USD $)	Sep. 30, 2012	Mar. 31, 2012
Aggregate Intrinsic Value	$ 19,325	$ 127,363
Options Outstanding, $4.35 - 5.24
Range of Exercise Prices, low	$ 4.35
Range of Exercise Prices, high	$ 5.24
Number of Options	3,750
Weighted Average Exercise Price Per Share	$ 4.35
Options Outstanding, $5.25 - 6.29
Range of Exercise Prices, low	$ 5.25
Range of Exercise Prices, high	$ 6.29
Number of Options	40,000
Weighted Average Exercise Price Per Share	$ 6.23
Options Outstanding, $6.30 - 6.80
Range of Exercise Prices, low	$ 6.30
Range of Exercise Prices, high	$ 6.80
Number of Options	40,000
Weighted Average Exercise Price Per Share	$ 6.80
Options Outstanding, $4.35 - 6.80
Range of Exercise Prices, low	$ 4.35
Range of Exercise Prices, high	$ 6.80
Number of Options	83,750
Weighted Average Exercise Price Per Share	$ 6.42
Weighted Average Remaining Contract Life in Years	8 years 55 days
Aggregate Intrinsic Value	$ 19,325