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v3.20.1

Revenue - Additional Information (Details) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 USD ($) contract unit | Mar. 31, 2019 USD ($) | Dec. 31, 2019 USD ($) contract
Revenue from Contract with Customer [Abstract] |  |  |
Number of units installed (over) | unit | 1,100 |  |
Unbilled receivables, current | $ 1,886 |  | $ 1,857
Contract liabilities | 497 |  | $ 712
Revenue recognized, included in contract liability balance | $ 248 | $ 224 |
Number of contracts identified as loss contracts | contract | 3 |  | 3
Provision for losses on contracts | $ 29 |  | $ 26

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- Definition Contract With Customer, Contracts In Progress, Number Of Contracts Identified As Loss Contracts + References No definition available. + Details
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- Definition Number Of Units Installed + References No definition available. + Details
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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118944033&loc=SL49130531-203044 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118944033&loc=SL49130532-203044 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130549-203045 + Details
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- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130549-203045 + Details
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- Definition Cumulative provision for contract losses not offset against related costs accumulated on the balance sheet. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 35 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=68068069&loc=d3e57777-111642 + Details
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- Definition Amount received for services rendered and products shipped, but not yet billed, for non-contractual agreements due within one year or the normal operating cycle, if longer. + References No definition available. + Details
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