Income Taxes (Details - Deferred income taxes) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets:
Net operating loss carry forwards	$ 97,622	$ 86,624
Impairment of property and equipment, and project assets	86	541
Temporary differences due to accrued warranty costs	83	103
Investment in subsidiaries	3,777	4,459
Credits	1,246	16
Allowance for bad debts	2,021	2,076
Fair value adjustment arising from subsidiaries acquisition	26	30
Stock compensation	2,790	1,861
Unrealized loss on derivatives	5,918	5,095
Unrealized investment loss	3,963	3,407
Other temporary differences	11,101	7,726
Valuation allowance	(128,152)	(111,770)
Total deferred tax assets	479	168
Deferred tax liabilities:
Fair value adjustment arising from subsidiaries acquisition	(2,673)	(2,970)
Total deferred tax liabilities	(2,673)	(2,970)
Net deferred tax liabilities	$ (2,194)	$ (2,802)