Note M - Income Taxes (Details Textual) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
State and Local Income Tax Expense (Benefit), Continuing Operations									$ (43,000)	$ (15,000)	$ (15,000)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	$ (10,597,000)	$ (9,985,000)	$ (6,521,000)	$ (16,326,000)	$ (9,940,000)	$ (13,433,000)	$ 9,764,000	$ (2,922,000)	(43,429,000)	$ (16,531,000)	$ (54,638,000)
Operating Loss Carryforwards	137,331,000								137,331,000
Increase (Decrease) in Deferred Tax Assets									(21.30)
State and Local Jurisdiction [Member]
Operating Loss Carryforwards	$ 134,600,000								$ 134,600,000
Operating Loss Carryforwards, Expiration, Beginning Year									2027
Operating Loss Carryforwards, Expiration, Ending Year									2037