2011 EQUITY INCENTIVE PLAN: (Option Activity) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		12 Months Ended
	Sep. 27, 2019	Jun. 28, 2019	Mar. 29, 2019
Shares
Outstanding at the Beginning	185,000	185,000
Granted
Exercised	(9,283)
Forfeited or Expired
Outstanding at the End	175,717	185,000	185,000
Fully Vested	171,717	181,000
Exercisable at the End	171,717	181,000
Weighted Avg. Exercise Price
Outstanding at the Beginning	$ 6.05	$ 6.05
Exercised	6.00
Outstanding at the End	6.24	6.05	$ 6.05
Fully Vested	$ 5.95	$ 5.87
Remaining Contractual Term (Years)
Outstanding	7 years 2 months 30 days		7 years 9 months
Fully Vested		7 years 6 months
Aggregate Intrinsic Value
Outstanding at the Beginning	$ 1,832	$ 1,832
Fully Vested		2,008
Outstanding at the End	$ 2,418	$ 1,832	$ 1,832