Revenue - Schedule of Contract Assets and Liabilities (Details) - USD ($) $ in Thousands  | 
3 Months Ended | |
|---|---|---|
Mar. 31, 2020  | 
Dec. 31, 2019  | 
|
| Account receivables, net of allowance | $ 10,226 | $ 13,178 | 
| Unbilled receivables - current | 10,188 | 7,984 | 
| Deferred revenue | 5,944 | $ 5,456 | 
| Year-to-date Change [Member] | ||
| Account receivables, net of allowance | (2,952) | |
| Unbilled receivables - current | 2,204 | |
| Deferred revenue | $ 488 | |
| Changes in Account receivables, net of allowance, percentage | (22.40%) | |
| Changes in Unbilled receivables - current, percentage | 27.60% | |
| Changes in Deferred revenue, percentage | 8.90% | 
| X | ||||||||||
- Definition Percentage of change in unbilled receivables - current percentage. No definition available. 
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| X | ||||||||||
- Definition Percentage of change in account receivables, net of allowance. No definition available. 
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| X | ||||||||||
- Definition Percentage of change in deferred revenue. No definition available. 
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- Definition Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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| X | ||||||||||
- Definition Amount of deferred income and obligation to transfer product and service to customer for which consideration has been received or is receivable, classified as current. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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| X | ||||||||||
- 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. No definition available. 
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| X | ||||||||||
- Details 
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