Debt - SVB Agreement (Details)		3 Months Ended	12 Months Ended
	Oct. 01, 2019 USD ($) $ / shares shares	Dec. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Debt Instrument [Line Items]
Issuance of warrants to purchase common stock in connection with long term debt			$ 72,000
Amortization of debt discount			90,000	$ 269,000
Debt instrument, unamortized discount		$ 102,000	102,000	0
SVB Loan Agreement
Debt Instrument [Line Items]
Outstanding principal, debt obligations		5,609,000	5,609,000	$ 0
Term Loan Facility | SVB Loan Agreement
Debt Instrument [Line Items]
Face amount	$ 5,247,000	$ 5,609,000	$ 5,609,000
Principal payment	291,500
Effective percentage		6.75%	6.75%
Fee amount	192,000,000
Debt issuance costs	$ 20,000,000
Amortization of debt discount		$ 90,000,000
Debt instrument, unamortized discount		$ 102,000	$ 102,000
Term Loan Facility | SVB Loan Agreement | Prime Rate
Debt Instrument [Line Items]
Basis spread	2.00%
SVB Warrant
Debt Instrument [Line Items]
Number of warrants called | shares	72,394
Exercise price (in dollars per share) | $ / shares	$ 0.01
Warrant term	10 years
Deferral Fee | Term Loan Facility | SVB Loan Agreement
Debt Instrument [Line Items]
Fee amount	$ 100,000
Maturity Fee | Term Loan Facility | SVB Loan Agreement
Debt Instrument [Line Items]
Fee amount	$ 262,000
Risk Free Interest Rate | SVB Warrant
Debt Instrument [Line Items]
Warrant measurement input	0.015
Expected Volatility | SVB Warrant
Debt Instrument [Line Items]
Warrant measurement input	1.43
Additional Paid-In Capital
Debt Instrument [Line Items]
Issuance of warrants to purchase common stock in connection with long term debt			$ 72,000