Note 5  Capital Stock, Stock Plans and Stockbased Compensation  BlackScholes Valuation Model Assumptions (Details)  $ / shares 
Jul. 28, 2016 
May 15, 2016 
Sep. 17, 2015 


Employee Stock Option [Member]  ^{}  
Weightedaverage fair value per share (in dollars per share)  ^{}  $ 2  
Risk free interest rate (1)  ^{[1]}  1.27%  
Expected volatility of stock (2)  ^{[2]}  53.12%  
Dividend yield  ^{}  0.00%  
Expected option life (3) (in years)  ^{[3]}  6 years  
Director Stock Options [Member]  ^{}  
Weightedaverage fair value per share (in dollars per share)  ^{}  $ 3  $ 1.52  
Risk free interest rate (1)  ^{[1]}  55.99%  0.00%  
Expected volatility of stock (2)  ^{[2]}  10.00%  

X  
 Definition Agreedupon price for the exchange of the underlying asset relating to the sharebased payment award. No definition available.

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

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

X  
 Definition The riskfree interest rate assumption that is used in valuing an option on its own shares. Reference 1: http://www.xbrl.org/2003/role/presentationRef

X  
 Definition Expected term of sharebased compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef

X  
 Details

X  
 Details
