Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenues		$ 9,820	$ 6,945	$ 16,136	$ 14,597
Cost of revenues		9,931	7,026	16,561	14,544
Gross (loss)/profit		(111)	(81)	(425)	53
Operating expenses
Sales and marketing expenses		45	78	93	147
General and administrative expenses		1,180	2,498	2,112	4,046
Research and development expenses		0	56	18	124
Total operating expenses		1,225	2,632	2,223	4,317
Loss from operations		(1,336)	(2,713)	(2,648)	(4,264)
Other income/(expenses)
Interest income		79	29	151	75
Other expenses, net		(9)	(19)	(14)	(28)
Impairment on long-term investments		(209)	0	(209)	0
Change in fair value of warrant liabilities		71	987	172	1,782
Total other income/(expenses)		(68)	997	100	1,829
Income tax benefit		1	2	2	4
Net income (loss)		(1,403)	(1,714)	(2,546)	(2,431)
Net loss		(1,403)	(1,714)	(2,546)	(2,431)
Foreign currency translation adjustment		283	5	202	(17)
Comprehensive loss		$ (1,120)	$ (1,709)	$ (2,344)	$ (2,448)
Loss per common share
Basic and diluted** (in dollars per share)	[1]	$ (0.19)	$ (0.24)	$ (0.35)	$ (0.34)
Weighted average number of common shares outstanding:
Basic and diluted** (in shares)	[1]	7,195,605	7,114,726	7,185,114	7,097,440
Unrelated Parties [Member]
Other income/(expenses)
Loss before income tax benefit		$ (1,404)	$ (1,716)	$ (2,548)	$ (2,435)
Related Parties [Member]
Other income/(expenses)
Net income (loss)		(1,403)	(1,714)	(2,546)	(2,431)
Net loss		$ (1,403)	$ (1,714)	$ (2,546)	$ (2,431)

[1] Retrospectively restated for effect of the 1-for-5 reverse stock split effective on January 18, 2023, see Note 4(g).