Note O - Net Loss Per Share - Summary of Computation of Basic and Diluted Net Loss and Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Net loss - basic and diluted	$ (24,522)	$ (56,466)
Weighted average number of shares of common stock - basic and diluted (in shares)	29,654,968	17,930,023
Net loss per share - basic and diluted (in dollars per share)	$ (0.83)	$ (3.15)