Number Of Sources Of Revenue

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- Definition

Revenue Recognition, Period Of Recognition

+ References

No definition available.

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- Definition

Revenue Recognition, Sales Returns, Period

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No definition available.

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- Definition

Revenue, Variable Consideration, Reserve For Sales Returns, Percent Of Revenue

+ References

No definition available.

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- Definition

Amortization period of cost capitalized in obtaining or fulfilling contract with customer, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 340
-SubTopic 40
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- Definition

Amount of impairment loss for asset recognized from cost incurred to obtain or fulfill contract with customer.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 340
-SubTopic 40
-Section 50
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-URI http://asc.fasb.org/extlink&oid=123353750&loc=SL49131252-203054

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- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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Revenue from Contracts with Customers - Narrative (Details)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) numberOfSources	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Disaggregation of Revenue [Line Items]
Sources of revenue \| numberOfSources			3
Return period			1 year
Deferred revenue	$ 15,019,000	$ 11,537,000	$ 15,019,000	$ 11,537,000	$ 15,019,000	$ 11,537,000	$ 13,656,000	$ 12,529,000	$ 12,102,000	$ 10,498,000
Amortization period	3 years		3 years		3 years
Contract asset, impairment loss	$ 0	$ 0	$ 0	$ 0
Hardware and other
Disaggregation of Revenue [Line Items]
Reserve for hardware returns					1.00%	1.00%
Activation Fees
Disaggregation of Revenue [Line Items]
Deferred revenue	$ 6,500,000		$ 6,500,000		$ 6,500,000			$ 7,000,000.0
Activation Fees \| Maximum
Disaggregation of Revenue [Line Items]
Deferred revenue recognition period			10 years
Activation Fees \| Minimum
Disaggregation of Revenue [Line Items]
Deferred revenue recognition period			12 months