Income Taxes, Deferred Taxes and Other Information (Details) $ in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2020 AUD ($)
Noncurrent [Abstract]
Accrued leave	$ 25	$ 397
Stock based compensation	285	360
Net operating loss carryforward	48,818	45,405
Other	26	42
Intangibles	2,627	1,786
R&D credit carryforward	531	531
Total deferred tax assets	52,312	48,521
Less: valuation allowance	(52,312)	(48,521)
Total	0	0
Operating Loss Carryforwards [Abstract]
Increase in valuation allowance	3,800	4,300
Unrecognized Tax Benefits [Abstract]
Uncertain tax positions	0	0
Penalties and Interest Accrued [Abstract]
Interest and penalties accrued on uncertain tax positions	$ 0	$ 0
Earliest Tax Year [Member]
Operating Loss Carryforwards [Abstract]
Net operating loss (NOL) carryforwards, expiration date	Dec. 31, 2024
Latest Tax Year [Member]
Operating Loss Carryforwards [Abstract]
Net operating loss (NOL) carryforwards, expiration date	Dec. 31, 2037
Federal [Member]
Operating Loss Carryforwards [Abstract]
Net operating loss (NOL) carryforwards	$ 212,200
Net operating loss (NOL) carryforwards with expiration date	119,700
Net operating loss (NOL) carryforwards with no expiration date	92,500
State [Member]
Operating Loss Carryforwards [Abstract]
Net operating loss (NOL) carryforwards	$ 61,700
Foreign [Member]
Operating Loss Carryforwards [Abstract]
Net operating loss (NOL) carryforwards			$ 0