CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Treasury Stock	Retained Earnings	Total
Balance at Jun. 30, 2021	$ 396	$ 18,201	$ (19,521)	$ 93,312	$ 92,388
Balance (in shares) at Jun. 30, 2021	39,595,883		(2,893,715)
Net income				7,752	7,752
Stock-based compensation expense		89			89
Stock options exercised		16			16
Stock options exercised (in shares)	5,000
Balance at Sep. 30, 2021	$ 396	18,306	$ (19,521)	101,064	100,245
Balance (in shares) at Sep. 30, 2021	39,600,883		(2,893,715)
Balance at Jun. 30, 2021	$ 396	18,201	$ (19,521)	93,312	92,388
Balance (in shares) at Jun. 30, 2021	39,595,883		(2,893,715)
Net income					12,062
Balance at Mar. 31, 2022	$ 396	19,735	$ (19,521)	105,374	105,984
Balance (in shares) at Mar. 31, 2022	39,627,255		(2,893,715)
Balance at Jun. 30, 2021	$ 396	18,201	$ (19,521)	93,312	92,388
Balance (in shares) at Jun. 30, 2021	39,595,883		(2,893,715)
Balance at Jun. 30, 2022	$ 396	20,005	$ (19,521)	112,911	113,791
Balance (in shares) at Jun. 30, 2022	39,628,197		(2,893,715)
Balance at Sep. 30, 2021	$ 396	18,306	$ (19,521)	101,064	100,245
Balance (in shares) at Sep. 30, 2021	39,600,883		(2,893,715)
Net income				1,037	1,037
Stock-based compensation expense		1,255			1,255
Stock options exercised		139			139
Stock options exercised (in shares)	24,588
Balance at Dec. 31, 2021	$ 396	19,700	$ (19,521)	102,101	102,676
Balance (in shares) at Dec. 31, 2021	39,625,471		(2,893,715)
Net income				3,273	3,273
Stock-based compensation expense		35			35
Stock options exercised (in shares)	1,784
Balance at Mar. 31, 2022	$ 396	19,735	$ (19,521)	105,374	105,984
Balance (in shares) at Mar. 31, 2022	39,627,255		(2,893,715)
Balance at Jun. 30, 2022	$ 396	20,005	$ (19,521)	112,911	113,791
Balance (in shares) at Jun. 30, 2022	39,628,197		(2,893,715)
Net income				3,084	3,084
Stock-based compensation expense		477			477
Stock options exercised		45			45
Stock options exercised (in shares)	8,480
Balance at Sep. 30, 2022	$ 396	20,527	$ (19,521)	115,995	117,397
Balance (in shares) at Sep. 30, 2022	39,636,677		(2,893,715)
Balance at Jun. 30, 2022	$ 396	20,005	$ (19,521)	112,911	113,791
Balance (in shares) at Jun. 30, 2022	39,628,197		(2,893,715)
Net income					16,562
Balance at Mar. 31, 2023	$ 397	21,220	$ (19,521)	129,473	131,569
Balance (in shares) at Mar. 31, 2023	39,661,495		(2,893,715)
Balance at Sep. 30, 2022	$ 396	20,527	$ (19,521)	115,995	117,397
Balance (in shares) at Sep. 30, 2022	39,636,677		(2,893,715)
Net income				3,929	3,929
Stock-based compensation expense		335			335
Stock options exercised (in shares)	2,756
Balance at Dec. 31, 2022	$ 396	20,862	$ (19,521)	119,924	121,661
Balance (in shares) at Dec. 31, 2022	39,639,433		(2,893,715)
Net income				9,549	9,549
Stock-based compensation expense		322			322
Stock options exercised	$ 1	36			37
Stock options exercised (in shares)	22,062
Balance at Mar. 31, 2023	$ 397	$ 21,220	$ (19,521)	$ 129,473	$ 131,569
Balance (in shares) at Mar. 31, 2023	39,661,495		(2,893,715)