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Merger with Macrocure and Related Transactions - Subscription Agreement (Details) - USD ($) $ / shares in Units, $ in Thousands		9 Months Ended
	Jan. 20, 2017	Sep. 30, 2017
Merger with Macrocure
Purchase price		$ 9,053
HCV IX | Subscription Agreement
Merger with Macrocure
Issuance of stock (in shares)	1,010,225
Purchase price	$ 10,000
Price per share (in dollars per share)	$ 9.90

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