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Related Party Transactions (Details) - USD ($)	1 Months Ended					3 Months Ended		6 Months Ended		12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Jan. 31, 2016	May 31, 2015	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2013	Dec. 31, 2010
Related-Party Transactions (Textual) [Abstract]
Long-term other assets	$ 2,639,354					$ 2,724,376		$ 2,724,376
Contra-research and development expense						$ 1,900,000		$ 4,100,000
GeneOne Life Sciences
Related-Party Transactions (Textual) [Abstract]
Investment owned (shares)						1,644,155		1,644,155
Payment received for license granted											$ 3,000,000
Term										20 years
Milestone-based ownership target				35.00%	35.00%
Proceeds from sale of intangible assets	1,000,000
Revenue from related parties						$ 32,000	$ 155,000	$ 150,000	$ 322,000
Operating expenses related to affiliated entity						1,100,000	722,000	2,800,000	1,200,000
Accounts receivable	0					31,000		31,000
Accounts payable and accrued liability	107,000					75,000		75,000
Long-term other assets	331,000					322,000		322,000
Director
Related-Party Transactions (Textual) [Abstract]
Term			5 years
Revenue from related parties							1,100,000		1,700,000
Operating expenses related to affiliated entity						399,000	485,000	802,000	1,000,000
Accounts receivable	117,000					500,000		500,000
Expenses to reimburse			$ 3,100,000
Award		$ 6,100,000
Contra-research and development expense						455,000		2,200,000
Accounts payable/accrued liabilities	820,000					526,000		526,000
Plumbline Life Sciences
Related-Party Transactions (Textual) [Abstract]
Revenue from related parties						28,000	$ 21,000	58,000	$ 88,000
Accounts receivable	$ 370,000					$ 429,000		$ 429,000
Plumbline Life Sciences | Available-for-sale Securities
Related-Party Transactions (Textual) [Abstract]
Investment owned (shares)						395,758		395,758

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