3. Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Schedule of estimated useful lives of property, plant and equipment

Depreciation is recorded on the straight-line method based on the estimated useful lives of the assets as follows:

Plant and machinery	5 or 6.67 years
Furniture, fixtures and equipment	3 or 5 years
Computers	3 or 5 years
Automobile	3 or 5 years
Leasehold improvements	The shorter of the estimated life or the lease term
PV solar system	17, 20, 25 or 27 years

Schedule of disaggregation of revenues

By revenue stream	For the year ended December 31, 2018
Continuing operations	Sales of PV components		Electricity revenue with PPAs		Sales of PV project asset		Bitcoin mining equipment sales and hosting service		Sales of pre- development solar projects		Others		Total
Australia	$	90,067	$	–	$	–	$	–	$	–	$	1,314	$	91,381
Japan		1,605		–		10,809		–		–		23		12,437
Italy		–		1,733		–		–		–		–		1,733
United States		1,875		–		–		1,052		15,794		–		18,721
United Kingdom		–		932		–		–		–		–		932
Greece		–		378		–		–		–		–		378
Total	$	93,547	$	3,043	$	10,809	$	1,052	$	15,794	$	1,337	$	125,582

By revenue stream

For the year ended December 31, 2017

Continuing operations

Sales of PV components

Electricity revenue with PPAs

Sales of PV project asset

Bitcoin mining equipment sales and hosting service

Sales of pre- development solar projects

Others

Total

Australia

$

111,284

$

–

$

–

$

–

$

–

$

890

$

112,174

Japan

511

–

–

–

–

–

511

Italy

–

1,932

–

–

–

–

1,932

United States

–

–

–

–

–

–

–

United Kingdom

–

861

6,042

–

–

–

6,903

Greece

–

–

–

–

–

–

–

Total

$

111,795

$

2,793

$

6,042

$

–

$

–

$

890

$

121,520

By revenue stream	For the year ended December 31, 2016
Continuing operations	Sales of PV components		Electricity revenue with PPAs		Sales of PV project asset		Bitcoin mining equipment sales and hosting service		Sales of pre- development solar projects		Others		Total
Australia	$	81,241	$	–	$	–	$	–	$	–	$	–	$	81,241
Japan		286		–		12,353		–		–		254		12,893
Italy		–		1,740		–		–		–		–		1,740
United States		2,771		1,626		2,075		–		–		150		6,622
United Kingdom		–		208		486		–		–		–		694
Greece		–		8,737		–		–		–		–		8,737
Germany		2,179		–		–		–		–		496		2,675
Total	$	86,477	$	12,311	$	14,914	$	–	$	–	$	900	$	114,602

By timing of revenue recognition	For the year ended December 31, 2018
Continuing operations	Sales of PV components		Electricity revenue with PPAs		Sales of PV project asset		Bitcoin mining equipment sales and hosting service		Sales of pre- development solar projects		Others		Total
Goods transferred at a point in time	$	93,547	$	3,043	$	10,809	$	681	$	15,794	$	1,337	$	125,211
Service transferred over time		–		–		–		371		–		–		371
Total	$	93,547	$	3,043	$	10,809	$	1,052	$	15,794	$	1,337	$	125,582

By timing of revenue recognition	For the year ended December 31, 2017
Continuing operations	Sales of PV components		Electricity revenue with PPAs		Sales of PV project asset		Bitcoin mining equipment sales and hosting service		Sales of pre- development solar projects		Others		Total
Goods transferred at a point in time	$	111,795	$	2,793	$	6,042	$	–	$	–	$	890	$	121,520
Service transferred over time		–		–		–		–		–		–		–
Total	$	111,795	$	2,793	$	6,042	$	–	$	–	$	890	$	121,520

By timing of revenue recognition	For the year ended December 31, 2016
Continued operations	Sales of PV components		Electricity revenue with PPAs		Sales of PV project asset		Bitcoin mining equipment sales and hosting service		Sales of pre- development solar projects		Others		Total
Goods transferred at a point in time	$	86,477	$	10,685	$	14,914	$	–	$	–	$	852	$	112,928
Service transferred over time		–		1,626		–		–		–		48		1,674
Total	$	86,477	$	12,311	$	14,914	$	–	$	–	$	900	$	114,602

Schedule of accounts receivables and contract liabilities

The following table provides information about accounts receivables and contract liabilities from contracts with customers:

	December 31, 2018		December 31, 2017
Accounts receivable, current and noncurrent	$	27,777	$	19,051
Advance from customers	$	25,984	$	31,122

Reconciliation of total interest cost

	For the years ended December 31,
	2018		2017		2016
Interest cost capitalized	$	292	$	1,607	$	1,724
Interest cost charged to expense		6,665		8,087		3,494
Total interest cost	$	6,957	$	9,694	$	5,218