Debt - SVB Agreement (Details)			3 Months Ended
	Jun. 26, 2020 USD ($)	Oct. 01, 2019 USD ($) $ / shares shares	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Mar. 31, 2019 USD ($)
Debt Instrument [Line Items]
Amortization of debt discount			$ 34,000		$ 0
Debt instrument, unamortized discount			68,000	$ 102,000
SVB Loan Agreement
Debt Instrument [Line Items]
Outstanding principal, debt obligations			$ 5,609,000	$ 5,609,000
Term Loan Facility | SVB Loan Agreement
Debt Instrument [Line Items]
Face amount		$ 5,247,000
Effective percentage			5.25%	6.75%
Fee amount		192,000
Debt issuance costs		$ 20,000
Amortization of debt discount			$ 34,000	$ 90,000
Debt instrument, unamortized discount			68,000	$ 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
Subsequent Events | Term Loan Facility | SVB Loan Agreement, Amendment
Debt Instrument [Line Items]
Principal payment	$ 291,500
Subsequent Events | Term Loan Facility | SVB Loan Agreement, Amendment | Prime Rate
Debt Instrument [Line Items]
Basis spread	4.25%