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Note 9 - Earnings (Loss) Per Share - Common Stock ("EPS") - Securities Excluded From the Diluted Per Share Calculation (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Exercise Price Less Than Average Market Price Of Common Shares [Member]
Antidilutive securities (in shares)	786,249	5,631,656	2,906,754	5,523,602
Exercise Price Less Than Average Market Price Of Common Shares [Member] | Preferred Stock [Member]
Antidilutive securities (in shares)		5,416,667	1,902,342	5,416,667
Exercise Price Less Than Average Market Price Of Common Shares [Member] | Employee Stock Option [Member]
Antidilutive securities (in shares)	256	205,497	11,838	101,327
Exercise Price Less Than Average Market Price Of Common Shares [Member] | Warrant [Member]
Antidilutive securities (in shares)	785,993	9,492	992,574	5,608
Exercise Price Greater Than Average Market Price Of Common Shares [Member]
Antidilutive securities (in shares)	1,728,364	1,613,146	1,521,862	1,629,813
Exercise Price Greater Than Average Market Price Of Common Shares [Member] | Employee Stock Option [Member]
Antidilutive securities (in shares)	1,541,558	262,094	1,335,056	278,761
Exercise Price Greater Than Average Market Price Of Common Shares [Member] | Warrant [Member]
Antidilutive securities (in shares)	186,806	1,351,052	186,806	1,351,052

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://fasb.org/us-gaap/role/ref/legacyRef
-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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