Investment valuation (Tables)

9 Months Ended

Sep. 30, 2022

Equity Method Investments and Joint Ventures [Abstract]

Schedule of financial instruments at fair value

	Fair Value Measurements as of September 30, 2022
	9/30/2022		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Investments in U.S. Treasury bills	$	2,421	$	-	$	2,421	$	-

	Fair Value Measurements as of December 31, 2021
	12/31/2021		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
U.S. Treasury bills included in cash and cash equivalents	$	5,250	$	-	$	5,250	$	-

Schedule of investments in debt securities

	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value
U.S. Treasury bills	$	2,417	$	4	$	-	$	2,421
Total	$	2,417	$	4	$	-	$	2,421