Stockholders' Equity - Schedule Of Common Stock Shares Reserved For Future Issuance (Details) - shares	Dec. 31, 2019	Dec. 31, 2018
Class of Stock [Line Items]
Total number of shares reserved for future issuance (in shares)	9,098,512	8,253,899
Common stock warrants issued and outstanding
Class of Stock [Line Items]
Total number of shares reserved for future issuance (in shares)	0	4,857
Options issued and outstanding
Class of Stock [Line Items]
Total number of shares reserved for future issuance (in shares)	1,503,247	2,094,137
Unvested restricted stock units
Class of Stock [Line Items]
Total number of shares reserved for future issuance (in shares)	886,030	547,891
Shares available for grant under future stock plans
Class of Stock [Line Items]
Total number of shares reserved for future issuance (in shares)	6,709,235	5,607,014