Income Taxes (Detail Textuals) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Operating Loss Carryforwards [Line Items]
Valuation allowance	$ 279,000	$ 253,000
US corporate income tax rate	34.00%	34.00%
Corporate income tax rate effective in 2018	21.00%
Expense due to enactment of federal tax reform	$ 261,000
Maximum
Operating Loss Carryforwards [Line Items]
US corporate income tax rate	35.00%
Domestic tax authority | Pennsylvania
Operating Loss Carryforwards [Line Items]
Valuation allowance	$ 2,240,000	$ 2,240,000
Net operating loss carryforward, expiration year	2019
Domestic tax authority | Arkansas
Operating Loss Carryforwards [Line Items]
Valuation allowance	$ 31,000	839,000
Net operating loss carryforward, expiration year	2018
Domestic tax authority | New York
Operating Loss Carryforwards [Line Items]
Tax credit carryforward	$ 115,000	$ 97,000
Tax credit carryforward, expiration year	2024