Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Deferred tax assets:
Stock-based compensation	$ 347	$ 268
Federal net operating loss carryover	432	14,078
State net operating loss carryover	1,063	1,353
Basis in partnerships	10,947	13,377
Inventory	1,521	944
Accrued expenses	2,182	1,418
Alternative minimum tax credit carryover	576	1,145
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Contingencies	385	0
Other	175	28
Deferred tax assets, gross	17,628	32,611
Valuation allowance	(1,063)	(1,346)	$ (1,147)
Deferred tax assets, net	16,565	31,265
Deferred tax liabilities:
Prepaid insurance	(66)	(17)
Other	0	(37)
Deferred tax liabilities	$ (66)	$ (54)