Income Taxes (Details) - USD ($)		12 Months Ended
	Jul. 01, 2018	Dec. 31, 2018	Mar. 31, 2019
Income Taxes (Textual)
NOL for Federal tax		$ 104,131,000
NOL for State tax		14,028,000
NOL for Foreign tax		688,000
Various tax credits, amount		$ 8,333,000
Period of expiration of various tax credits		Expire from 2019 to 2037.
Net operating loss carry forwards, limitations on use, description		Limits the use of NOLs to the extent there has been an ownership change of more than 50 percentage points.
Description of new jersey taxation of corporations	The New Jersey governor signed into law a bill which included significant changes to the New Jersey taxation of corporations. Chiefly, this legislation imposes a 2.5% surtax on taxpayers with allocated net income over $1 million for 2018 and 2019, and a 1.5% surtax for taxpayers with allocated net income over $1 million for 2020 and 2021.
NOL carryforwards			$ 610,676