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Note 3 - Net Loss Per Share - Antidilutive Securities (Details)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Basic and diluted (in shares)	18,820,775us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted	18,747,529us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted
Potentially dilutive (in shares)	47,500us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	74,397us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

X

- Definition

Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 45

-Paragraph 28A

-URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1500-109256

+ Details

Name:	us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Average number of shares or units issued and outstanding that are used in calculating basic and diluted earnings per share (EPS).

+ References

No definition available.

+ Details

Name:	us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration