Note J - Severence Expense (Details Textual) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)
Employee Severance [Member] | Severance Expense [Member]
Restructuring Charges	$ 1,100
Allocated Share-based Compensation Expense	1,900
Employee Severance [Member] | Accounts Payable and Accrued Liabilities [Member]
Restructuring Reserve	1,100		$ 1,100
Severance Expense [Member]
Allocated Share-based Compensation Expense	$ 1,910		1,910
Restructuring and Related Cost, Number of Positions Eliminated	3
Allocated Share-based Compensation Expense	$ 3,279	$ 492	$ 5,558	$ 1,456