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Note 5 - Accounting for Stock-based Compensation (Tables)

6 Months Ended

Jun. 30, 2017

Notes Tables

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

		For Three Months Ended June 30, 2017				For Three Months Ended June 30, 2016				For Six Months Ended June 30, 2017				For Six Months Ended June 30, 2016
Weighted average grant date fair value		$	0.26			$	0.29			$	0.26			$	0.29
Weighted average assumptions used:
Expected dividend yield			0.0	%			0.0	%			0.0	%			0.0	%
Risk-free interest rate			1.77	%			1.38	%			1.77	%			1.38	%
Expected volatility			75.0	%			96.0	%			75.0	%			96.0	%
Expected life (in years)			5.0				5.0				5.0				5.0

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- Definition

Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- References

No definition available.

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