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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
OPERATING ACTIVITIES      
Net income $ 40,347,000 $ 29,026,000 $ 19,444,000
Adjustments to reconcile net income to net cash provided by (used for) operating activities:      
Depreciation and amortization 1,905,000 1,816,000 1,954,000
Stock-based compensation expense 2,707,000 2,289,000 3,102,000
Gain on sale of assets     (31,000)
Deferred income tax benefit (1,798,000) (140,000) (311,000)
Pension settlement loss 1,180,000   647,000
(Increase) decrease in assets:      
Accounts receivable (2,078,000) 1,444,000 1,901,000
Income taxes receivable (18,000) (10,000) 907,000
Inventories 246,000 (30,951,000) (757,000)
Prepaid expenses and other current assets (614,000) (527,000) 109,000
Other non-current assets 2,675,000 (1,889,000) (4,428,000)
Increase (decrease) in liabilities:      
Accounts payable 1,479,000 692,000 2,193,000
Accrued expenses and other liabilities 4,042,000 (4,287,000) 2,426,000
Other long-term liabilities (725,000) 2,994,000 2,718,000
Net cash provided by operating activities 49,348,000 457,000 29,874,000
INVESTING ACTIVITIES      
Capital expenditures (2,500,000) (1,248,000) (2,099,000)
Proceeds from sale of assets     34,000
Net cash used for investing activities (2,500,000) (1,248,000) (2,065,000)
FINANCING ACTIVITIES      
Payment of dividends (17,077,000) (15,629,000) (13,550,000)
Cash paid for common stock purchased and retired (702,000) (1,051,000) (2,490,000)
Net cash used for financing activities (17,779,000) (16,680,000) (16,040,000)
Net increase (decrease) in cash and cash equivalents 29,069,000 (17,471,000) 11,769,000
Cash and cash equivalents at beginning of period 14,102,000 31,573,000 19,804,000
Cash and cash equivalents at end of period 43,171,000 14,102,000 31,573,000
Supplemental information:      
Income tax payments, net $ 13,022,000 $ 7,493,000 $ 4,099,000