Consolidated Statements of Convertible Preferred Stock and Stockholders' Equity (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Direct Registered Offering
Offering cost		$ 177
Public Offering
Offering cost	$ 11,146	10,631
At The Market Offering Program
Offering cost		$ 6

Adjustments to additional paid in capital stock issued offering costs.

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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