CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net income	$ 15,998	$ 15,325	$ 13,203
Depreciation and amortization	3,684	3,454	3,673
Deferred income taxes	89	86	(1,775)
Other, net	458	289	181
Change in assets and liabilities:
Accounts receivable, net	250	(1,709)	(115)
Inventories, net	(1,439)	(1,846)	(473)
Accounts payable and accrued liabilities	(399)	1,619	(962)
Accounts with affiliates	(203)	152	(971)
Other, net	27	(207)	(178)
Net cash provided by operating activities	18,465	17,163	12,583
Cash flows from investing activities:
Capital expenditures	(3,166)	(3,117)	(2,796)
Proceeds from sale of fixed assets, net	125
Note receivable from affiliate:
Collections	40,800	51,000	41,300
Advances	(34,900)	(46,800)	(52,100)
Net cash provided by (used in) investing activities	2,859	1,083	(13,596)
Cash flows from financing activities -
Dividends paid	(3,483)	(2,487)	(2,485)
Net increase (decrease)	17,841	15,759	(3,498)
Balance at beginning of year	45,414	29,655	33,153
Balance at end of year	63,255	45,414	29,655
Supplemental disclosures -
Cash paid for income taxes	$ 5,027	$ 4,370	$ 6,709