CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities:
Net loss	$ (33,723)	$ (44,834)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	3,226	3,344
Amortization	936	3,931
Loss on extinguishment of convertible bonds	2,634	0
Change in fair value of derivative liability	183	(67)
Write down for inventory	148	983
(Reversal of) Provision for doubtful accounts	(993)	2,735
Provision for prepaid and other current assets	1,574	0
Impairment charges on long-lived assets	1,955	0
Share-based compensation expense	3,095	5,789
Restricted stock units issued to employees	623	0
Amortization of right-of-use assets	2,572	1,768
Amortization of debt discount on convertible bonds	1,396	540
Change in deferred taxes	(468)	(1,082)
Loss on disposal of property and equipment	(707)	(57)
Non-cash interest expense	461	0
Accrual of warranty reserve	126	99
Gain on forgiveness of PPP loan	(5,094)	(205)
Other non-cash expense	100	34
Changes in operating assets and liabilities
Accounts receivable	338	1,185
Amount due from related parties	(102)	(36)
Project assets	(1,835)	(6,008)
Inventories	(6,772)	(7,065)
Prepaid expenses and other assets	410	(4,565)
Accounts payable	5,740	8,547
Advances from customers	4,213	3,628
Income taxes payable	1,827	1,653
Accrued liabilities and other liabilities	4,567	3,971
Lease liability	(2,396)	(1,772)
Net cash used in operating activities	(15,966)	(27,484)
Cash flows from investing activities:
Proceeds from disposal of subsidiaries	110	453
PDI asset purchase (Note 4)	0	(8,003)
Acquisitions of property and equipment	(8,267)	(1,316)
Net cash used in investing activities	(8,157)	(8,866)
Cash flows from financing activities:
Proceeds from issuance of ordinary shares	1,161	13,591
Proceeds from issuance of convertible note	2,000	16,000
Repayment of convertible notes	0	(13,935)
Proceeds from exercise of employee stock options	0	91
Proceeds from exercise of options issued to Lighting Charm Limited during disposition of SPI China	0	1,091
Proceeds from exercise of Phoenix options	138	0
Proceeds received from standby equity purchase agreement of Phoenix	30	0
Proceeds from IPO of Phoenix	13,438	0
Proceeds from line of credit and loans payable	141,545	175,101
Repayments of line of credit and loans payable	(141,008)	(173,514)
Net cash generated from financing activities	17,304	18,425
Effect of exchange rate changes on cash	(39)	(4,012)
Decrease in cash, cash equivalents and restricted cash	(6,858)	(21,937)
Cash, cash equivalents and restricted cash at beginning of year	17,845	39,782
Cash, cash equivalents and restricted cash at end of year	10,987	17,845
Cash and cash equivalents	3,533	9,765
Restricted cash	6,743	8,080
Restricted cash, non current	711	0
Total cash, cash equivalents, and restricted cash	10,987	17,845
Supplemental cash flow information:
Interest paid	2,410	1,236
Income tax paid	484	58
Non-cash activities:
Derivative liabilities recorded as debt discount	3,407	0
Right of use assets obtained in exchange for operating lease obligations	3,450	8,502
Purchase of equipment on credit	1,311	0
Reclassification from project asset to property and equipment	681	3,683
Settlement of convertible bond by issuing ordinary shares	8,659	0
Redemption of convertible bond by issuing ordinary shares	$ 535	$ 4,375