Note 10 - Stock Incentive Plans - Valuation Assumptions for Performance Stock Units (Details) - $ / shares	Jul. 23, 2018	Jul. 20, 2018
Fair market value of the Company's Common Stock (in dollars per share)	$ 1.67	$ 1.68
Performance Share Units [Member]
Risk-free interest rate	2.70%	2.66%
Expected dividend yield	0.00%	0.00%
Expected volatility	36.89%	37.08%
Simulation period (in years) (Year)	3 years	3 years
Performance Share Units [Member] \| Share-based Compensation Award, Tranche One [Member]
Estimated fair value per award (in dollars per share)	$ 0.35	$ 0.37
Performance Share Units [Member] \| Share-based Compensation Award, Tranche Two [Member]
Estimated fair value per award (in dollars per share)	0.58	0.59
Performance Share Units [Member] \| Share-based Compensation Award, Tranche Three [Member]
Estimated fair value per award (in dollars per share)	$ 0.70	$ 0.71

The fair value per award estimated as part of the assumptions of share-based compensation.

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- Definition

Simulation period of share-based compensation awards.

+ References

No definition available.

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(iii)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(ii)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(iv)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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- Definition

Price of a single share of a number of saleable stocks of a company.

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