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Note 16 - Share-Based and Other Compensation Programs Awards Summary (Tables) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Programs, Compensation Cost Recognized [1] $ 17,649 $ 13,492 $ 16,304
Less: Costs deferred as acquisition costs 324 269 206
Stock-based compensation expense impact on net loss before income taxes - increase 17,325 13,223 16,098
Employee Stock Purchase Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Programs, Compensation Cost Recognized [1] 453 432 449
RSUs - Cash Settled      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Programs, Liability Recorded 0 0 18
Share-based Compensation Programs, Compensation Cost Recognized [1] 0 1 (718)
RSUs (Equity Settled)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Programs, Compensation Cost Recognized [1] $ 16,591 $ 12,206 $ 13,285
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number 3,763,633 3,434,976 3,208,454
Non-Qualified Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Programs, Compensation Cost Recognized [1] $ 603 $ 851 $ 3,286
Share-based Compensation Programs, Options, Equity Instruments Outstanding 1,312,791 1,692,743 2,839,738
Phantom Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Programs, Compensation Cost Recognized [1] $ 2 $ 2 $ 2
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number 234,427 234,302 234,174
Equity (Equity Settled)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Programs, Compensation Cost Recognized [1] $ 17,649 $ 13,491 $ 17,022
[1] For purposes of calculating compensation cost recognized, we generally consider awards effectively vested (and we recognize the full compensation costs) when grantees become retirement eligible.