Note F - Common Stock and Warrants - Common Stock Activity (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Balance (in shares)			14,657,430
Common stock sold under First ATM Agreement (in shares)			762,338
Common stock issued as a result of Deerfield Convertible Note principal and interest conversion (in shares)			598,568
Common stock options exercised (in shares)	0	0	23,682	9,750
Balance (in shares)	16,042,018		16,042,018