Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 20,964,000	$ 17,462,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	5,240,000	5,037,000
Deferred income taxes	164,000	328,000
Loss on disposal of fixed assets	28,000	108,000
Stock compensation expense	780,000	662,000
Change in assets and liabilities:
Receivables	(2,697,000)	(4,547,000)
Inventories	(845,000)	(3,909,000)
Other current assets	(993,000)	(4,302,000)
Other assets	(80,000)	(145,000)
Accounts payable	4,459,000	456,000
Accrued and other liabilities	3,402,000	6,938,000
Income taxes payable	1,019,000	0
Net cash provided by operating activities	31,441,000	18,088,000
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of fixed assets	(11,716,000)	(7,719,000)
Proceeds from sales of fixed assets	5,000	19,000
Net cash used in investing activities	(11,711,000)	(7,700,000)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from revolving credit facility	20,000,000	0
Repayments on revolving credit facility	(20,000,000)	0
Proceeds from stock options	136,000	444,000
Repurchase of common stock	(2,938,000)	(1,500,000)
Dividends paid on common stock	(4,093,000)	(3,987,000)
Net cash used in financing activities	(6,895,000)	(5,043,000)
INCREASE IN CASH AND CASH EQUIVALENTS	12,835,000	5,345,000
CASH AND CASH EQUIVALENTS:
BEGINNING OF PERIOD	15,518,000	10,173,000
END OF PERIOD	$ 28,353,000	$ 15,518,000