Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Oct. 03, 2021	Dec. 31, 2020
CURRENT ASSETS:
Cash and cash equivalents	$ 91,013	$ 86,036
Marketable securities	33,313	68,981
Accounts receivable, net	51,110	53,667
Inventories:
Finished goods	47,352	31,440
Work in process	94,990	96,463
Raw materials	8,243	7,585
Total inventory	150,585	135,488
Notes receivable, current	2,486	2,869
Other current assets	16,679	10,199
Total current assets	345,186	357,240
PROPERTY, PLANT AND EQUIPMENT	98,880	96,488
Less allowance for depreciation	61,364	59,375
PROPERTY, PLANT AND EQUIPMENT, NET	37,516	37,113
GOODWILL	15,317	15,317
INTANGIBLE ASSETS, net	2,678	2,838
NOTES RECEIVABLE	7,563	7,399
RIGHT-OF-USE LEASE ASSETS	10,277	3,363
DEFERRED INCOME TAXES	3,022	2,994
OTHER ASSETS	4,350	6,906
Assets, Total	425,909	433,170
CURRENT LIABILITIES:
Accounts payable	41,814	33,474
Federal and state income taxes	2,212	4,777
Lease liabilities	537	573
Accrued liabilities	16,595	16,268
Total current liabilities	61,158	55,092
LEASE LIABILITIES - NON-CURRENT	9,740	2,790
OTHER NON-CURRENT LIABILITIES	940	940
Total liabilities	71,838	58,822
STOCKHOLDERS' EQUITY
Common stock, $1 par value: Authorized: 12,000,000 shares Issued: 7,440,518 shares	7,441	7,441
Paid-in capital	13,468	12,438
Retained earnings	345,959	367,627
Accumulated other comprehensive income	48	154
Stockholders' Equity before Treasury Stock	366,916	387,660
Treasury stock, at cost	12,845	13,312
Total stockholders' equity	354,071	374,348
Liabilities and Equity, Total	$ 425,909	$ 433,170