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Note 8 - Earnings Per Share (EPS) - Securities Excluded From the Diluted Per Share Calculation (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Exercise Price Less Than Average Market Price Of Common Shares [Member]
Antidilutive securities (in shares)	5,631,656	5,452,188	5,523,602	5,430,065
Exercise Price Less Than Average Market Price Of Common Shares [Member] | Preferred Stock [Member]
Antidilutive securities (in shares)	5,416,667	5,416,667	5,416,667	5,416,667
Exercise Price Less Than Average Market Price Of Common Shares [Member] | Employee Stock Option [Member]
Antidilutive securities (in shares)	205,497	28,992	101,327	13,398
Exercise Price Less Than Average Market Price Of Common Shares [Member] | Warrant [Member]
Antidilutive securities (in shares)	9,492	6,529	5,608
Exercise Price Greater Than Average Market Price Of Common Shares [Member]
Antidilutive securities (in shares)	1,613,146	1,871,702	1,629,813	1,936,285
Exercise Price Greater Than Average Market Price Of Common Shares [Member] | Employee Stock Option [Member]
Antidilutive securities (in shares)	262,094	215,000	278,761	231,667
Exercise Price Greater Than Average Market Price Of Common Shares [Member] | Warrant [Member]
Antidilutive securities (in shares)	1,351,052	1,656,702	1,351,052	1,704,618

X

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

+ Details

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