CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities:
Net income	$ 10,457	$ 9,118	$ 8,661
Depreciation and amortization	3,698	3,536	3,533
Deferred income taxes	(114)	125	468
Provision for inventory reserves	161	233	24
Other, net	169	125	133
Change in assets and liabilities:
Accounts receivable, net	(1,596)	(46)	(251)
Inventories, net	(37)	1,532	(3,652)
Accounts payable and accrued liabilities	153	(1,036)	3,119
Accounts with affiliates	970	37	93
Other, net	3	(148)	42
Net cash provided by operating activities	13,864	13,476	12,170
Cash flows from investing activities:
Capital expenditures	(3,175)	(4,218)	(2,825)
Note receivable from affiliate:
Collections	9,200
Advances	(36,600)
Other, net			(48)
Net cash used in investing activities	(30,575)	(4,218)	(2,873)
Cash flows from financing activities -
Dividends paid	(2,483)	(2,481)	(2,480)
Net cash used in financing activities	(2,483)	(2,481)	(2,480)
Net increase (decrease)	(19,194)	6,777	6,817
Cash and cash equivalents - Net increase (decrease) from:
Operating, investing and financing activities	(19,194)	6,777	6,817
Balance at beginning of year	52,347	45,570	38,753
Balance at end of year	33,153	52,347	45,570
Supplemental disclosures -
Cash paid for income taxes	$ 4,646	$ 4,743	$ 4,449