Summary of Opening and Closing Balances of Contract Liabilities (Detail) - USD ($) $ in Thousands |
Dec. 31, 2018 |
Dec. 31, 2017 |
|---|---|---|
| Accounting Policies [Abstract] | ||
| Undelivered elements (product training, installation, product and support services) | $ 730 | $ 980 |
| Extended warranty contracts | 1,735 | 1,634 |
| Deferred royalties | 11 | 22 |
| Total deferred revenue | 2,476 | 2,636 |
| Less: long-term portion of deferred revenue | 11 | |
| Deferred revenue – current | $ 2,476 | $ 2,625 |
| X | ||||||||||
- Definition Contract with customer liability in deferred royalties. No definition available.
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| X | ||||||||||
- Definition Contract with customer liability in extended warranty contracts. No definition available.
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| X | ||||||||||
- Definition Contract with customer liability in undelivered elements. No definition available.
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as noncurrent. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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