Income Taxes (Details Narrative) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Income Tax [Line Items]
Federal statutory rate	21.00%	35.00%
Income tax benefit	$ (93,000)	$ (1,789,000)
Operating loss carryforwards	613,000	19,233,000
Research and development credit carryforwards	44,000	170,000
Valuation allowance, deferred tax asset, increase, amount	797,000
Federal Research Tax Credit Carryforward [Member]
Income Tax [Line Items]
Tax credit carryforward, amount	1,330,000	1,220,000
State Research Tax Credit Carryforward [Member]
Income Tax [Line Items]
Tax credit carryforward, amount	42,000	45,000
Federal [Member]
Income Tax [Line Items]
Operating loss carryforwards	82,241,000
New Jersey [Member]
Income Tax [Line Items]
Operating loss carryforwards	2,244,000
Foreign [Member]
Income Tax [Line Items]
Operating loss carryforwards	7,903,000
2018 Federal [Member]
Income Tax [Line Items]
Operating loss carryforwards	2,780,000
New Jersey [Member]
Income Tax [Line Items]
Decrease in deferred tax assets	$ 99,000	$ 1,903,000
Minimum [Member] | Foreign [Member]
Income Tax [Line Items]
Operating loss carryforwards, expiration date	Dec. 31, 2019
Maximum [Member] | Foreign [Member]
Income Tax [Line Items]
Operating loss carryforwards, expiration date	Dec. 31, 2038