CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - $ / shares	1 Months Ended
Jun. 30, 2019	Jan. 31, 2019	Jun. 30, 2018	Nov. 30, 2017	Jan. 31, 2017
Stock issued in transaction (shares)	2,415,000	1,854,838	3,162,500
Sale price of common stock (USD per share)	$ 97.00	$ 62.00	$ 38.85
Warrant
Stock issued in transaction (shares)			421,650	4,137,999	7,258,263
Sale price of common stock (USD per share)			$ 38.849	$ 12.999	$ 5.599

Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

No definition available.

Name:	us-gaap_SaleOfStockPricePerShare
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant