Non-Cash Share-Based Employee Compensation (Details) (USD $)	3 Months Ended
Jun. 30, 2012
Notes to Financial Statements
Outstanding	503,444
Vested	473,444
Nonvested	30,000
Issued	25,000
Exercised	2,500
Forfeited
Expired	60,000
Outstanding	495,944
Vested	470,944
Nonvested	25,000
Outstanding	$ 3.53
Vested	$ 3.63
Nonvested	$ 2
Issued	$ 2.03
Exercised	$ 0.88
Forfeited
Expired	$ 5.52
Outstanding	$ 3.43
Vested	$ 3.51
Nonvested	$ 2.03
Outstanding	4 years 7 months 6 days
Vested	4 years 6 months 29 days
Nonvested	4 years 10 months 24 days
Outstanding	$ 2.30
Vested	$ 2.40
Nonvested	$ 0.61
Issued	$ 0.68
Exercised	$ 0.62
Forfeited
Expired	$ 2.28
Outstanding	$ 2.24
Vested	$ 2.33
Nonvested	$ 0.68
Outstanding
Vested
Nonvested
Issued
Exercised
Forfeited
Expired
Outstanding	3,500
Vested	$ 3,500
Nonvested

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The intrinsic value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units, as calculated by applying the disclosed pricing methodology.

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Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The total accumulated difference between fair values of underlying shares on dates of exercise and exercise price on options which were exercised (or share units converted) into shares during the reporting period under the plan.

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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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The combined weighted average of the accumulated differences between the fair values on underlying shares and exercises prices to acquire such shares as of the grant date on options that were either forfeited or lapsed.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of options outstanding.

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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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As of the balance sheet date, the weighted-average exercise price (at which grantees can acquire the shares reserved for issuance) for exercisable stock options that are fully vested or expected to vest.

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As of the balance sheet date, the number of shares into which fully vested and expected to vest stock options outstanding can be converted under the option plan.

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Number of share instruments newly issued under a share-based compensation plan.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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