Income Taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Federal:
Current	$ 777,000	$ 394,000
Deferred	514,000	14,000
Federal Income Taxes	1,291,000	408,000
State:
Current	108,000	147,000
Deferred	63,000	2,000
Total State	171,000	149,000
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Income taxes at statutory rate	1,461,000	543,000
State income taxes, net of federal benefit	134,000	41,000
Domestic production activities deduction	(77,000)	0
Stock compensation deferred tax asset write-off	25,000	0
Other	(81,000)	(27,000)
Income tax expense	$ 1,462,000	$ 557,000
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Income taxes at statutory rate (percent)	34.00%	34.00%
State income taxes, net of federal benefit (percent)	2.70%	2.60%
Domestic production activities deduction (percent)	(1.60%)	(0.00%)
Stock compensation deferred tax asset write-off (percent)	0.50%	0.00%
Other (percent)	(1.60%)	(1.70%)
Effective income tax rate (percent)	34.00%	34.90%
Components of Deferred Tax Assets and Liabilities [Abstract]
Unrealized losses on investments available for sale	$ (1,404,000)	$ (855,000)
Unrealized losses on investments available for sale	15,000	6,000
Allowance for doubtful accounts	128,000	147,000
Vacation accrued	106,000	105,000
Deferred income	281,000	302,000
State NOL carryforward	75,000	43,000
Other	35,000	62,000
Net deferred tax liability	(764,000)	(190,000)
Current portion, net	640,000	665,000
Long-term portion, net	$ 1,404,000	$ 855,000