Note I - Stockholders' Equity - Summary of Shares to be Issued (Details) - shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Shares-to-be-issued, outstanding (in shares)	2,375,760	2,470,566
Granted in current period (in shares)	642,667	2,103,793
Issued in current period (in shares)	(590,098)	(2,198,599)
Shares-to be issued outstanding (in shares)	2,428,329	2,375,760