5. Stockholders equity (Details 2) (USD $)	Jun. 30, 2012
Number of options and warrants	1,902,962
Options and Warrants 1
Exercise Price	1.25
Number of options and warrants	1,709,000
Options and Warrants 2
Exercise Price	1.5
Number of options and warrants	20,000
Options and Warrants 3
Exercise Price	2
Number of options and warrants	12,500
Options and Warrants 4
Exercise Price	3
Number of options and warrants	35,000
Options and Warrants 5
Exercise Price	3.25
Number of options and warrants	1,462
Options and Warrants 6
Exercise Price	3.73
Number of options and warrants	125,000

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

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(1)(a)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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