Collaboration and License Agreement (Details)	3 Months Ended
	Mar. 31, 2018 USD ($)
Change in Contract with Customer Liability [Roll Forward]
Deferred revenue - current	$ 0
Additions	229,000
Deductions	0
Deferred revenue - current	229,000
Deferred revenue - non-current	0
Additions	304,000
Deductions	0
Deferred revenue - non-current	304,000
Total contract liabilities:	0.00
Additions	533,000
Deductions	0
Total contract liabilities:	$ 533,000.00