Income Taxes - Additinal information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Operating Loss Carryforwards [Line Items]
State net operating loss carryforwards, state tax credit carryforwards and other state net deferred tax assets valuation allowance	$ 236,000	$ 248,000
Valuation allowance	236,000	248,000
Uncertain tax positions or unrecognized tax benefits	0	0
Domestic Tax Authority | Pennsylvania
Operating Loss Carryforwards [Line Items]
Valuation allowance	$ 1,620,000	1,805,000
Operating loss carryforward	2020
Domestic Tax Authority | Arkansas
Operating Loss Carryforwards [Line Items]
Valuation allowance	$ 0	31,000
Domestic Tax Authority | New York
Operating Loss Carryforwards [Line Items]
Tax credit carryforward	$ 139,000	$ 131,000
Tax credit carryforward expiration date in years	2023