QUARTERLY FINANCIAL REPORTING (UNAUDITED) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2017	Apr. 02, 2017	Jan. 01, 2017	Oct. 02, 2016	Jun. 30, 2016	Mar. 27, 2016	Dec. 27, 2015	Sep. 27, 2015	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
QUARTERLY FINANCIAL REPORTING (UNAUDITED)
Net sales	$ 58,325	$ 58,486	$ 51,134	$ 60,689	$ 53,386	$ 57,030	$ 55,203	$ 55,981	$ 228,634	$ 221,600	$ 214,386
Gross profit	16,456	14,925	14,286	17,809	14,033	15,842	15,365	15,839	63,476	61,079	51,166
Operating income	10,559	4,282	7,039	11,635	7,698	7,513	2,780	4,020	33,515	22,011	23,920
Net income	$ 6,315	$ 2,241	$ 4,031	$ 6,983	$ 4,769	$ 4,894	$ 1,870	$ (1,323)	$ 19,570	$ 10,210	$ 5,534
Basic earnings per share (in dollars per share)	$ 0.34	$ 0.12	$ 0.22	$ 0.38	$ 0.27	$ 0.26	$ 0.10	$ (0.08)	$ 1.05	$ 0.57	$ 0.50
Diluted earnings per share (in dollars per share)	$ 0.34	$ 0.12	$ 0.22	$ 0.38	$ 0.26	$ 0.26	$ 0.10	$ (0.08)	$ 1.05	$ 0.56	$ 0.47
Weighted average shares used for computation of:
Basic earnings per share (in shares)	18,593,501	18,593,296	18,592,936	18,591,808	17,849,319	18,574,887	17,998,796	16,263,793	18,592,885	17,849,319	11,139,000
Diluted earnings per share (in shares)	18,659,246	18,625,904	18,605,078	18,592,603	18,257,007	18,779,557	18,606,884	16,263,793	18,620,708	18,257,007	11,862,699