Stock-based Compensation - Summary of activity of stock options (Details) (USD $)	3 Months Ended
Jun. 30, 2013	Mar. 31, 2013
Notes to Financial Statements
Number of Shares Outstanding	115,000	80,000
Weighted Average Exercise Price Per Share	$ 6.35	$ 6.52
Weighted Aggregate Average Remaining Contract Life in Years	8 years 11 days
Intrinsic Value
Vested - Shares Outstanding	30,000
Vested - Weighted Average Exercise Price Per Share	$ 6.42
Vested - Weighted Aggregate Average Remaining Contract Life in Years	7 years 208 days
Vested - Intrinsic Value
Exercisable - Shares Outstanding	30,000
Exercisable - Weighted Average Exercise Price Per Share	$ 6.42
Exercisable - Weighted Aggregate Average Remaining Contract Life in Years	7 years 208 days
Exercisable - Intrinsic Value

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of fully vested and expected to vest options that are exercisable.

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The number of exercisable share options (fully vested and expected to vest) that may be converted as of the balance sheet date.

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