Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Deferred tax assets:
Stock-based compensation	$ 408	$ 347
Federal net operating loss carryover	0	432
State net operating loss carryover	0	1,063
Basis in partnerships	9,212	10,947
Inventory	2,316	1,521
Accrued expenses	2,206	2,182
Alternative minimum tax credit carryover	0	576
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Contingencies	1,444	385
Deferred Tax Assets, Operating Leases Liabilities	832	0
Other	191	175
Deferred tax assets, gross	16,609	17,628
Valuation allowance	0	(1,063)	$ (1,346)
Deferred tax assets, net	16,609	16,565
Deferred Tax Liabilities, Leasing Arrangements	(818)	0
Deferred tax liabilities:
Prepaid insurance	(419)	(66)
Other	(110)	0
Deferred tax liabilities	$ (1,347)	$ (66)