Income Taxes (Details - Deferred income taxes) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Net operating loss carry forwards	$ 86,624	$ 78,319
Temporary differences due to accrued warranty costs	103	138
Investment in subsidiaries	4,459	4,459
Credits	16	16
Allowance for bad debts	2,076	1,545
Fair value adjustment arising from subsidiaries acquisition	30	29
Stock compensation	1,861	820
Unrealized loss on derivatives	5,095	5,109
Unrealized investment loss	3,407	4,390
Impairment of property and equipment, and project assets	541	541
Other temporary differences	7,726	6,841
Valuation allowance	(111,770)	(102,125)
Total deferred tax assets	168	82
Deferred tax liabilities:
Fair value adjustment arising from subsidiaries acquisition	(2,970)	(3,966)
Other	0	0
Total deferred tax liabilities	(2,970)	(3,966)
Net deferred tax liabilities	$ (2,802)	$ (3,884)