Income Taxes - Deferred tax assets and liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Deferred taxes, net
Net operating loss carryforward	$ 211	$ 469
Accruals	62	22
Reserves	66	9
Property, plant and equipment, and intangible assets	124	48
Stock-based compensation expense	85	85
Other	63	4
Total deferred tax assets	611	637
Valuation allowance	(477)	(629)
Net deferred tax assets	$ 134	$ 8