License Agreement - Additional Information (Details)	1 Months Ended
	Jan. 31, 2015 USD ($) shares
Other Commitments [Line Items]
Shares issued as consideration for licensing agreement, shares | shares	2,100,085
Research and development
Other Commitments [Line Items]
Payment of license fees	$ 59,579,000
ZIOPHARM Oncology, Inc.
Other Commitments [Line Items]
Annual funding commitment, term	3 years
Minimum | ZIOPHARM Oncology, Inc.
Other Commitments [Line Items]
Annual funding commitment, amount	$ 15,000,000
Maximum | ZIOPHARM Oncology, Inc.
Other Commitments [Line Items]
Annual funding commitment, amount	$ 20,000,000