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Schedule of Changes in Accumulated Balances of Other Comprehensive Income (Loss), Net of Taxes (Detail) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2017
Revenues: |  |  |  |  |
Revenues | $ 17,494 | $ 20,575 | $ 35,063 | $ 41,862 |
Cost of revenues | 1,988 | 1,608 | 3,960 | 3,304 |
Gross profit | 15,506 | 18,967 | 31,103 | 38,558 |
Operating expenses: |  |  |  |  |
Sales and marketing | 3,399 | 3,427 | 6,575 | 6,365 |
Other operating expenses | 14,768 |  | 30,097 |  |
Total operating expenses | 18,167 | 16,797 | 36,672 | 32,042 |
Operating loss | (2,661) | 2,170 | (5,569) | 6,516 |
Financial income, net | 777 | 755 | 1,704 | 1,326 |
Loss before taxes on income | (1,884) | 2,925 | (3,865) | 7,842 |
Income taxes | 206 | (983) | 407 | (173) |
Net loss | $ (2,090) | $ 3,908 | $ (4,272) | $ 8,015 |
Basic net loss per share | $ (0.09) | $ 0.18 | $ (0.19) | $ 0.37 |
Diluted net loss per share | $ (0.09) | $ 0.17 | $ (0.19) | $ 0.36 |
Assets: |  |  |  |  |
Trade receivables | $ 9,246 |  | $ 9,246 |  | $ 14,480
Accrued revenues | 8,753 |  | 8,753 |  | 2,014
Prepaid expenses and other current assets | 6,244 |  | 6,244 |  | 3,747
Liabilities: |  |  |  |  |
Deferred revenues | 2,717 |  | 2,717 |  | 4,399
Stockholders' equity: |  |  |  |  |
Retained earnings | 58,068 |  | 58,068 |  | $ 53,873
Licensing and Related Revenue |  |  |  |  |
Revenues: |  |  |  |  |
Revenues | 10,038 | $ 10,337 | 20,121 | $ 19,872 |
Royalties |  |  |  |  |
Revenues: |  |  |  |  |
Revenues | 7,456 | $ 10,238 | 14,942 | $ 21,990 |
Calculated under Revenue Guidance in Effect before Topic 606 | ASU 2014-09 |  |  |  |  |
Revenues: |  |  |  |  |
Revenues | 16,604 |  | 36,136 |  |
Cost of revenues | 1,988 |  | 3,960 |  |
Gross profit | 14,616 |  | 32,176 |  |
Operating expenses: |  |  |  |  |
Sales and marketing | 3,291 |  | 6,457 |  |
Other operating expenses | 14,768 |  | 30,097 |  |
Total operating expenses | 18,059 |  | 36,554 |  |
Operating loss | (3,443) |  | (4,378) |  |
Financial income, net | 777 |  | 1,704 |  |
Loss before taxes on income | (2,666) |  | (2,674) |  |
Income taxes | 305 |  | 769 |  |
Net loss | $ (2,971) |  | $ (3,443) |  |
Basic net loss per share | $ (0.13) |  | $ (0.16) |  |
Diluted net loss per share | $ (0.13) |  | $ (0.16) |  |
Assets: |  |  |  |  |
Trade receivables | $ 8,461 |  | $ 8,461 |  |
Accrued revenues | 1,564 |  | 1,564 |  |
Prepaid expenses and other current assets | 6,648 |  | 6,648 |  |
Liabilities: |  |  |  |  |
Deferred revenues | 2,872 |  | 2,872 |  |
Stockholders' equity: |  |  |  |  |
Retained earnings | 50,343 |  | 50,343 |  |
Calculated under Revenue Guidance in Effect before Topic 606 | ASU 2014-09 | Licensing and Related Revenue |  |  |  |  |
Revenues: |  |  |  |  |
Revenues | 9,035 |  | 18,599 |  |
Calculated under Revenue Guidance in Effect before Topic 606 | ASU 2014-09 | Royalties |  |  |  |  |
Revenues: |  |  |  |  |
Revenues | 7,569 |  | 17,537 |  |
Effect of change higher/(lower) | ASU 2014-09 |  |  |  |  |
Revenues: |  |  |  |  |
Revenues | 890 |  | (1,073) |  |
Gross profit | 890 |  | (1,073) |  |
Operating expenses: |  |  |  |  |
Sales and marketing | 108 |  | 118 |  |
Total operating expenses | 108 |  | 118 |  |
Operating loss | 782 |  | (1,191) |  |
Loss before taxes on income | 782 |  | (1,191) |  |
Income taxes | (99) |  | (362) |  |
Net loss | $ 881 |  | $ (829) |  |
Basic net loss per share | $ 0.04 |  | $ (0.04) |  |
Diluted net loss per share | $ 0.04 |  | $ (0.04) |  |
Assets: |  |  |  |  |
Trade receivables | $ 785 |  | $ 785 |  |
Accrued revenues | 7,189 |  | 7,189 |  |
Prepaid expenses and other current assets | (404) |  | (404) |  |
Liabilities: |  |  |  |  |
Deferred revenues | (155) |  | (155) |  |
Stockholders' equity: |  |  |  |  |
Retained earnings | 7,725 |  | 7,725 |  |
Effect of change higher/(lower) | ASU 2014-09 | Licensing and Related Revenue |  |  |  |  |
Revenues: |  |  |  |  |
Revenues | 1,003 |  | 1,522 |  |
Effect of change higher/(lower) | ASU 2014-09 | Royalties |  |  |  |  |
Revenues: |  |  |  |  |
Revenues | $ (113) |  | $ (2,595) |  |

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