Note 4 - Stockholders' Equity (Details) - $ / shares	3 Months Ended
Jun. 30, 2016	Mar. 31, 2016
Details
Preferred stock par value	$ 0.001	$ 0.001
Common stock par value	$ 0.001	$ 0.001
Preferred stock shares authorized	10,000,000	10,000,000
Common stock shares authorized	100,000,000	100,000,000
Common stock shares issued	53,316,134	53,256,296
Common stock shares outstanding	53,316,134	53,256,296
Restricted shares of common stock issued for the settlement of previously vested restricted stock awards	59,953

Face amount or stated value per share of common stock.

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- Definition

The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

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Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

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The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

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Number of shares of stock issued attributable to transactions classified as other.

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