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REVENUE (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2021

Dec. 31, 2020

REVENUE

Schedule of information on the disaggregation of revenue

The following table provides information on the disaggregation of revenue as recorded in the consolidated statements of operations (in thousands):

​

​	​	March 31,
​		2021			2020		​
Partnership hardware revenue	​	$	10,539	​	$	718	​
Partnership service revenue	​	​	36	​	​	—	​
Host customer service revenue	​	​	4,845	​	​	3,393	​
Total revenue	​	$	15,420	​	$	4,111	​

The following table provides information on the disaggregation of revenue as recorded in the consolidated statements of operations (in thousands):

​	​	​	​	​	​	​
​	​	December 31,
​		2020			2019
Partnership hardware revenue	​	$	20,662	​	$	4,070
Partnership service revenue	​		51	​		6
Host customer service revenue	​	​	15,594	​		13,476
Total revenue	​	$	36,307	​	$	17,552

​

Schedule of remaining performance obligations

​

​	​	Total remaining		​	Percent Expected to be Recognized as Revenue
​	​	performance		​	Less than	​	Two to	​	Greater than	​
​		obligations			one year		five years		five year	​
​	​	(in thousands, except percentages)								​
Service revenue	​	$	114,440	​	13	%	48	%	39	%
Hardware revenue	​	​	57,989	​	100	%	—	%	—	%
Total revenue	​	$	172,429	​	​	​	​	​	​	​

​

​	​	​	​	​	​	​	​	​	​	​
​	​	Total		​	​	​	​	​	​
​	​	remaining		​	Percent expected to be recognized as revenue
​	​	performance		​	Less than	​	Two to	​	Greater
​		obligations			one year	​	five years	​	than five year
​	​	​	​	​	(in thousands, except percentages)					​
Service revenue	​	$	107,909		13	%	50	%	37	%
Hardware revenue	​		41,012		100	%	—		—	​
Total revenue	​	$	148,921							​

Schedule of changes in the deferred revenue balance

​

Beginning balance as of January 1, 2021		$	52,410
Upfront payments received from customers	​	​	12,053	​
Upfront or annual incentive payments received	​	​	1,772	​
Revenue recognized related to amounts that were included in beginning balance of deferred revenue	​	​	(9,860)	​
Revenue recognized related to deferred revenue generated during the period	​	​	(973)	​
Ending balance as of March 31, 2021	​	$	55,402	​

​	​	​	​	​	​	​
​	​	December 31,
​		2020			2019
Beginning balance at January 1,	​	$	20,728	​	$	11,859
Upfront payments received from customers	​		40,481	​		6,698
Upfront or annual incentive payments received	​		8,015	​		8,240
Revenue recognized related to amounts that were included in beginning balance of deferred revenue	​		(9,764)	​		(4,830)
Revenue recognized	​		(7,050)	​		(1,239)
Ending balance at December 31,	​	$	52,410	​	$	20,728

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- Definition

Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130551-203045

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Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045

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- Definition

Tabular disclosure of expected timing for satisfying remaining performance obligation.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (b)(1)
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