Note O - Severance Expense (Details Textual) $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Dec. 31, 2016
USD ($)
|
Sep. 30, 2016
USD ($)
|
Jun. 30, 2016
USD ($)
|
Mar. 31, 2016
USD ($)
|
Dec. 31, 2015
USD ($)
|
Sep. 30, 2015
USD ($)
|
Jun. 30, 2015
USD ($)
|
Mar. 31, 2015
USD ($)
|
Dec. 31, 2016
USD ($)
|
Dec. 31, 2015
USD ($)
|
Dec. 31, 2014
USD ($)
|
|
| Restructuring and Related Cost, Number of Positions Eliminated | 3 | ||||||||||
| Restructuring Charges | $ 3,010 | ||||||||||
| Allocated Share-based Compensation Expense | $ 6,600 | $ 2,369 | $ 214 | ||||||||
| Severance Expense [Member] | |||||||||||
| Allocated Share-based Compensation Expense | 1,910 | ||||||||||
| Employee Severance [Member] | Accounts Payable and Accrued Liabilities [Member] | |||||||||||
| Restructuring Reserve | $ 600 | 600 | |||||||||
| Employee Severance [Member] | Severance Expense [Member] | |||||||||||
| Restructuring Charges | 1,100 | ||||||||||
| Allocated Share-based Compensation Expense | $ 1,900 | ||||||||||