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Note 12 - Share-Based Payments (Detail) - Details of stock option transactions for the three months ended June 30, 2011 and June 30, 2010 are (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Outstanding, beginning of period	8,592,686	8,746,041
Outstanding, beginning of period (in Dollars per share)	$ 0.64	$ 0.57
Granted	150,000	45,000
Granted (in Dollars per share)	$ 1.44	$ 1.05
Exercised	(56,857)	(294,217)
Exercised (in Dollars per share)	$ 0.68	$ 0.44
Forfeited	(13,813)	(38,125)
Forfeited (in Dollars per share)	$ 1.06	$ 0.84
Outstanding, end of period	8,672,016	8,458,699
Outstanding, end of period (in Dollars per share)	$ 0.65	$ 0.57
Options exercisable, end of period	7,044,598	6,746,199
Options exercisable, end of period (in Dollars per share)	$ 0.57	$ 0.54

X

- Definition

The weighted average price at which option holders acquired shares when exercising their stock options into shares under the plan during the reporting period.

+ References

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The weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were forfeited during the reporting period due to noncompliance with plan terms during the reporting period.

+ References

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The weighted average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on stock options granted under the plan during the reporting period.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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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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Net number of share options (or share units) granted during the period.

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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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