Royalty Revenues and Accounts Payable (Details Textual) - USD ($)	1 Months Ended	3 Months Ended				9 Months Ended		12 Months Ended
	Jan. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Sep. 30, 2017	Jun. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Proceeds from Royalties Received					$ 3,500,000
Adjustments To Royalties Revenue								$ 313,000
Revenues		$ (280,000)		$ 151,000		$ (205,000)	$ 8,366,000
Royalty Income, Nonoperating		54,000
Accounts Payable, Current		533,000				533,000		225,000
Royalty [Member]
Revenues		(280,000)		$ 151,000		(205,000)	$ 8,366,000
Merck [Member]
Proceeds from Royalties Received	$ 88,000
Accrued Royalties, Current	$ 313,000		$ 253,000					313,000
Offsetting Of Royalty Income								88,000
Accrued Royalties, Current After Offsetting								225,000
Adjustments To Royalties Revenue		280,000				313,000		$ 88,000
Decreases Of Royalty Revenues		280,000
Royalty Income, Nonoperating		54,000
Royalty Expense		334,000
Accounts Payable, Current		533,000				$ 533,000
Merck [Member] | IRAQ
Royalty Expense		$ 254,000
Merck [Member] | Royalty [Member]
Revenues			$ 60,000