Warrants (Details) $ in Thousands		3 Months Ended
	Mar. 25, 2020 USD ($) shares	Mar. 31, 2020 USD ($)
Class of Warrant or Right [Line Items]
other expenses		$ 47
Series G Warrants
Class of Warrant or Right [Line Items]
Number of warrants issued | shares	1,200,000
Value of warrants issued	$ 1,400
Series G Warrants | Risk-free interest rate
Class of Warrant or Right [Line Items]
Warrant fair value measurement inputs (as a percent)	0.56
Series G Warrants | Expected dividends
Class of Warrant or Right [Line Items]
Warrant fair value measurement inputs (as a percent)	0
Series G Warrants | Expected term
Class of Warrant or Right [Line Items]
Warrants term	5 years
Series G Warrants | Expected volatility
Class of Warrant or Right [Line Items]
Warrant fair value measurement inputs (as a percent)	97.00