Investments in available-for-sale debt securities (Details 1) $ in Thousands	Jun. 30, 2022 USD ($)
Debt Securities, Available-for-Sale, Amortized Cost
Amortized cost, Due in one year or less	$ 428
Amortized cost, Due after one year through five years	2,677
Amortized cost, Mortgage-backed securities	410
Amortized cost	3,515
Debt Securities, Available-for-Sale, Maturity, Fair Value
Fair value, Due in one year or less	425	[1]
Fair value, Due after one year through five years	2,607	[1]
Fair value, Mortgage-backed securities	404	[1]
Fair Value	$ 3,436	[1]

[1] The fair value of the Company's available-for-sale debt securities are determined based upon inputs, other than the quoted prices in active markets, that are observable either directly or indirectly, and are classified as level 2 fair value measurements.