Investments (Tables)

12 Months Ended

Dec. 31, 2021

Investments, Debt and Equity Securities [Abstract]

Schedule of investment holdings

The Company's investments consist of the following:

	Accumulated Cost at December 31, 2021		Unrealized				Market Value at December 31, 2021
			Gain		(Loss)
Short-term investments
U.S. government and agency securities	$	10,669	$	—	$	(8)	$	10,661
Total	$	10,669	$	—	$	(8)	$	10,661

	Accumulated Cost at December 31, 2020		Unrealized				Market Value at December 31, 2020
			Gain		(Loss)
Short-term investments
U.S. government and agency securities	$	6,279	$	—	$	—	$	6,279
Total	$	6,279	$	—	$	—	$	6,279