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Note 1 - Description of Business and Significant Accounting Policies (Details Textual)
$ in Thousands
12 Months Ended
Nov. 06, 2018
USD ($)
Dec. 31, 2019
USD ($)
Jan. 01, 2019
USD ($)
Dec. 31, 2018
USD ($)
Number of Operating Segments   1    
Payments of Dividends, Total   $ 0    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate   0.00%    
Operating Lease, Right-of-Use Asset   $ 7,443  
Operating Lease, Liability, Total   $ 8,694    
Accounting Standards Update 2016-02 [Member]        
Operating Lease, Right-of-Use Asset     $ 7,200  
Operating Lease, Liability, Total     $ 8,200  
Minimum [Member]        
Finite-Lived Intangible Asset, Useful Life   5 years    
Maximum [Member]        
Finite-Lived Intangible Asset, Useful Life   20 years    
Software Development [Member]        
Property, Plant and Equipment, Useful Life   3 years    
US Treasury Securities [Member]        
Cash Equivalents, US Treasury Securities Collateral for Reverse Repurchase Agreements, Percent of Principal   102.00%    
Quest [Member]        
Proceeds from Divestiture of Businesses $ 170,000