Income Taxes - Components of Deferred Income Taxes (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deferred Tax Assets:
Accumulated net operating losses (tax effected)	$ 12,736	$ 13,132
Lease liability	86	136
Share-based compensation	2,370	3,027
Intangibles	889	944
Capitalized research and development	6,662	5,018
Accumulated depreciation	10	14
Accrued payroll	218	118
Other	638	579
Deferred tax assets	23,609	22,968
Deferred Tax Liabilities:
Right-of-use asset	(87)	(137)
Cash to accrual	0	(99)
Deferred tax liabilities	(87)	(236)
Net deferred tax asset	23,522	22,732
Valuation allowance	(23,522)	(22,732)
Net deferred tax asset	$ 0	$ 0