Investments in held-to-maturity debt securities (Details 1) $ in Thousands	Mar. 31, 2022 USD ($)
Debt Securities, Held-to-Maturity, Amortized Cost
Amortized cost, Due in one year or less	$ 76
Amortized cost, Due after one year through five years	2,038
Amortized cost, Mortgage-backed securities	300
Amortized cost	2,414
Debt Securities, Held-to-maturity, Maturity, Fair Value
Fair value, Due in one year or less	76	[1]
Fair value, Due after one year through five years	2,031	[1]
Fair value, Mortgage-backed securities	298	[1]
Fair value	$ 2,405	[1]

[1] The fair value of the Company's held-to-maturity 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.