Note A - Basis of Presentation and Summary of Significant Accounting Policies - Calculation of Basic and Diluted Net Income Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended		21 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020
Numerator
Net (loss) income	$ (4,015)	$ 1,994	$ (3,443)	$ 6,734	$ (3,443)
Denominator
Basic weighted average common shares outstanding (in shares)	6,564,765	6,800,375	6,733,781	6,791,105
Dilutive effect of stock options and restricted stock (in shares)		595,000		329,000
Diluted weighted average common shares outstanding (in shares)	6,564,765	7,394,600	6,733,781	7,119,589
Basic net (loss) income per common share (in dollars per share)	$ (0.61)	$ 0.29	$ (0.51)	$ 0.99
Diluted net (loss) income per common share (in dollars per share)	$ (0.61)	$ 0.27	$ (0.51)	$ 0.95