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SIGNIFICANT ACCOUNTING POLICIES (Details - Investment in Joint Ventures) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	Jun. 24, 2022	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Roll Forward]
Beginning balance				$ 42,229
Equity in earnings in these joint ventures		$ 2,748	$ 3,121	5,266	$ 5,406
Equity contributions in existing joint ventures	$ 1,400			1,441
Ending balance		$ 48,936		$ 48,936

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Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures

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Amount of income (loss) for proportionate share of equity method investee's income (loss).

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Amount of investment in equity method investee and investment in and advance to affiliate.

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