Income Taxes (Details Narrative) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Sale approved	$ 332,000
Sale approved percentage	6.20%
Proceeds from sale of tax benefits	$ 311,000
Net deferred tax assets	27,568,000	$ 26,112,000
Valuation allowance, deferred tax asset, increase (decrease), amount	$ 31,449,000	$ 29,588,000
Valuation allowance increased (decreased) after federal corporate tax	1,505,000	(5,641,000)	2,287,000
New Jersey [Member]
Operating loss carryforwards	$ 40,104,000
Operating loss carryforwards, expiration year	2038
Foreign Tax Authority [Member]
Operating loss carryforwards	$ 84,702,000
Deferred tax assets, operating loss carryforwards, state and local	65,359,000
Deferred tax assets, operating loss carryforwards, foreign	$ 3,452,000
Federal Jurisdiction [Member]
Operating loss carryforwards, expiration year	2021 through 2037
State and Local Jurisdiction [Member]
Operating loss carryforwards, expiration year	2019 through 2038
Tax Cuts and Jobs Act [Member]
Valuation allowance, deferred tax asset, increase (decrease), amount	$ 10,848,000
Decrease in federal corporate tax rate	21.00%