Restricted Cash (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Restricted Cash [Abstract]
Restricted cash	$ 998	$ 802
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	998	$ 802
Money Market Funds
Restricted Cash [Abstract]
Restricted cash	800
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	800
Guaranteed Investment Certificate
Restricted Cash [Abstract]
Restricted cash	200
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	$ 200