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Nature of Business (Details) - USD ($) $ in Thousands	1 Months Ended
	Jan. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Feb. 29, 2016	Sep. 30, 2018
Liquidity
Accumulated deficit		$ (305,850)			$ (391,223)
Initial Public Offering
Liquidity
Aggregate net proceeds				$ 97,500
2017 March Offering
Liquidity
Aggregate net proceeds			$ 96,700
2017 December Offering
Liquidity
Aggregate net proceeds		$ 57,200
2018 January Offerings
Liquidity
Aggregate net proceeds	$ 48,500

X

- Definition

The cash inflow associated with the amount received from entity's first offering of stock to the public.

+ References

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