Marketable Securities - Schedule of Available for Sale (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2020 USD ($)
Amortized Cost	$ 6,338
Gross Unrealized Gains
Gross Unrealized Losses	63
Fair Value	6,401
Marketable securities	6,401
Less Than Twelve Months [Member]
Gross Unrealized Gains
Fair Value	1,093
12 Months or More [Member]
Gross Unrealized Gains	63
Fair Value	5,308
U.S. Treasury Notes [Member]
Amortized Cost	1,772
Gross Unrealized Gains
Gross Unrealized Losses	(4)
Fair Value	1,768
Marketable securities	1,768
U.S. Treasury Notes [Member] | Less Than Twelve Months [Member]
Gross Unrealized Gains
Fair Value	605
U.S. Treasury Notes [Member] | 12 Months or More [Member]
Gross Unrealized Gains	(4)
Fair Value	1,163
U.S. Government Mortgage Backed Securities [Member]
Amortized Cost	2,001
Gross Unrealized Gains
Gross Unrealized Losses	(4)
Fair Value	1,997
Marketable securities	1,997
U.S. Government Mortgage Backed Securities [Member] | Less Than Twelve Months [Member]
Gross Unrealized Gains
Fair Value
U.S. Government Mortgage Backed Securities [Member] | 12 Months or More [Member]
Gross Unrealized Gains	(4)
Fair Value	1,997
Corporate Bonds [Member]
Amortized Cost	2,565
Gross Unrealized Gains
Gross Unrealized Losses	71
Fair Value	2,636
Marketable securities	2,636
Corporate Bonds [Member] | Less Than Twelve Months [Member]
Gross Unrealized Gains
Fair Value	488
Corporate Bonds [Member] | 12 Months or More [Member]
Gross Unrealized Gains	71
Fair Value	$ 2,148