CONSOLIDATED STATEMENT OF STOCKHOLDERS EQUITY - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Total
BALANCE at Jun. 30, 2017	$ 212,000	$ 16,638,000	$ (11,732,000)	$ 51,771,000	$ 56,889,000
BALANCE (in shares) at Jun. 30, 2017	21,174,507		(2,329,850)
Repurchase of treasury shares	$ 0	0	$ (1,337,000)	0	(1,337,000)
Repurchase of treasury shares (in shares)	0		(145,395)
Stock options exercised	$ 0	106,000	$ 0	0	$ 106,000
Stock options exercised (in shares)	29,820,000		0		452
Stock-based compensation expense	$ 0	146,000	$ 0	0	$ 146,000
Net income	0	0	0	7,649,000	7,649,000
BALANCE at Jun. 30, 2018	$ 212,000	16,890,000	$ (13,069,000)	59,420,000	63,453,000
BALANCE (in shares) at Jun. 30, 2018	21,204,327		(2,475,245)
Repurchase of treasury shares	$ 0	0	$ (3,998,000)	0	(3,998,000)
Repurchase of treasury shares (in shares)	0		(274,065)
Stock options exercised	$ 0	53,000	$ 0	0	53,000
Stock options exercised (in shares)	22,767		0
Stock-based compensation expense	$ 0	160,000	$ 0	0	160,000
Net income	0	0	0	12,223,000	12,223,000
BALANCE at Jun. 30, 2019	$ 212,000	17,103,000	$ (17,067,000)	70,924,000	71,172,000
BALANCE (in shares) at Jun. 30, 2019	21,227,094		(2,749,310)
Implementation of ASC606	$ 0	$ 0	$ 0	$ (719,000)	$ (719,000)