Schedule of Cash and Held to Maturity Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Cash	$ 1,256	$ 3,258
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	26,801	29,699
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain	3	2
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss	(5)	(8)
Debt Securities, Held-to-Maturity, Fair Value	26,799	29,693
Cash and Cash Equivalents	5,623	8,586	$ 35,095
Restricted Cash, Current	525	525	618
Short-Term Investments	20,041	19,844
Restricted Cash, Noncurrent	612	744	$ 1,138
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss	5	8
Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	5,504	1,615
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss	(1)
Debt Securities, Held-to-Maturity, Fair Value	5,503	1,615
Cash and Cash Equivalents	4,367	346
Restricted Cash, Current	525	525
Short-Term Investments
Restricted Cash, Noncurrent	612	744
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss	1
US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	9,959	14,833
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain	1	2
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss		(2)
Debt Securities, Held-to-Maturity, Fair Value	9,960	14,833
Cash and Cash Equivalents		4,982
Restricted Cash, Current
Short-Term Investments	9,959	9,851
Restricted Cash, Noncurrent
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss		2
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	10,082	9,993
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain	2
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss	(4)	(6)
Debt Securities, Held-to-Maturity, Fair Value	10,080	9,987
Cash and Cash Equivalents
Restricted Cash, Current
Short-Term Investments	10,082	9,993
Restricted Cash, Noncurrent
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss	4	6
Subtotal [Member] | Fair Value, Inputs, Level 2 [Member]
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	25,545	26,441
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain	3	2
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss	(5)	(8)
Debt Securities, Held-to-Maturity, Fair Value	25,543	26,435
Cash and Cash Equivalents	4,367	5,328
Restricted Cash, Current	525	525
Short-Term Investments	20,041	19,844
Restricted Cash, Noncurrent	612	744
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss	$ 5	$ 8