Current report of foreign issuer pursuant to Rules 13a-16 and 15d-16 Amendments

Note 7 - Other Equity (Details Textual)

v3.10.0.1
Note 7 - Other Equity (Details Textual)
3 Months Ended 6 Months Ended
Mar. 28, 2017
Jun. 30, 2018
USD ($)
shares
Jun. 30, 2017
USD ($)
Jun. 30, 2018
USD ($)
shares
Jun. 30, 2017
USD ($)
Statement Line Items [Line Items]          
Number of share options granted in share-based payment arrangement       2,084,000 728,000
Number of shares reserved for issue under options and contracts for sale of shares | shares   6,021,923   6,021,923  
First set of stock options issued in a share-based payment arrangement [member]          
Statement Line Items [Line Items]          
Share-based payment arrangements, option vesting percentage, year one       50.00%  
Share-based payment arrangements, option vesting percentage, year two       16.67%  
Share-based payment arrangements, option vesting percentage, year three       16.67%  
Share-based payment arrangements, option vesting percentage, year four       16.67%  
Second set of stock options issued in a share-based payment arrangement [member]          
Statement Line Items [Line Items]          
Share-based payment arrangements, option vesting percentage, year one       50.00%  
Share-based payment arrangements, option vesting percentage, year two       25.00%  
Number of share options granted in share-based payment arrangement       116,000  
Share-based payment arrangements, option vesting percentage, year three       25.00%  
Third set of stock options issued in a share-based payment arrangement, vesting immediately [member]          
Statement Line Items [Line Items]          
Number of share options granted in share-based payment arrangement       850,000  
Stock options [member]          
Statement Line Items [Line Items]          
Expense from share-based payment transactions with employees   $ 515,000 $ 286,000 $ 2,743 $ 339,000
Restricted share units [member]          
Statement Line Items [Line Items]          
Expense from share-based payment transactions with employees   $ 0 $ 163,000 $ 0 $ 171,000
Number of other equity instruments granted in share-based payment arrangement 150,000     150,000