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QUARTERLY DATA (Unaudited) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Mar. 27, 2021
Dec. 26, 2020
Sep. 26, 2020
Jun. 27, 2020
Mar. 28, 2020
Dec. 28, 2019
Sep. 28, 2019
Jun. 29, 2019
Mar. 27, 2021
Mar. 28, 2020
Quarterly Financial Information Disclosure [Abstract]                    
Total Revenues $ 48,762 $ 44,062 $ 41,607 $ 38,904 $ 45,762 $ 43,179 $ 41,763 $ 42,395 $ 173,335 [1] $ 173,099 [1]
Gross Profit 13,970 11,245 11,494 9,409 12,053 9,928 10,445 10,052 46,118 42,478
Net Income $ 3,208 $ 1,761 $ 2,024 $ 798 $ 2,493 $ 1,477 $ 2,379 $ 1,718 $ 7,791 $ 8,067
Basic Earnings Per Share (in Dollars per share) $ 0.43 [2] $ 0.24 [2] $ 0.27 [2] $ 0.11 [2] $ 0.34 [2] $ 0.20 [2] $ 0.32 [2] $ 0.24 [2] $ 1.05 $ 1.10
Diluted Earnings Per Share (in Dollars per share) $ 0.42 [2] $ 0.23 [2] $ 0.27 [2] $ 0.11 [2] $ 0.33 [2] $ 0.20 [2] $ 0.32 [2] $ 0.23 [2] $ 1.03 $ 1.08
[1] Revenues are attributed to the countries based on the destination of a product shipment or the location where service is rendered.
[2] Earnings per share calculations for each quarter include the weighted average effect of stock issuances and common stock equivalents for the quarter; therefore, the sum of quarterly earnings per share amounts may not equal full-year earnings per share amounts, which reflect the weighted average effect on an annual basis. Diluted earnings per share calculations for each quarter include the effect of stock options and non-vested restricted stock units, when dilutive to the quarter. In addition, basic earnings per share and diluted earnings per share may not add due to rounding.