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Balance Sheet Account Details (Tables) | 12 Months Ended
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Dec. 31, 2018
Other Balance Sheet Details [Abstract] |
Schedule of Investment Categories | The following table summarizes the various investment categories at December 31, 2018 and 2017 (in thousands):
| Cost |  | Gross unrealized gains |  | Gross unrealized losses |  | Estimated fair value
December 31, 2018 |  |  |  |  |  |  |
Short-term investments |  |  |  |  |  |  |
Bank deposits | $ | 311,066 |  | $ | 26 |  | $ | (29) |  | $ | 311,063
Corporate bonds | 53,223 |  | 1 |  | (45) |  | 53,179
Corporate equity securities | 135 |  | 1,191 |  | — |  | 1,326
Commercial paper | 225,731 |  | 8 |  | (76) |  | 225,663
U.S. Government bonds | 7,982 |  | — |  | (9) |  | 7,973
Municipal bonds | 2,017 |  | — |  | (4) |  | 2,013
| $ | 600,154 |  | $ | 1,226 |  | $ | (163) |  | $ | 601,217
December 31, 2017 |  |  |  |  |  |  |
Short-term investments |  |  |  |  |  |  |
Bank deposits | $ | 80,095 |  | $ | 6 |  | $ | (42) |  | $ | 80,059
Corporate bonds | 55,335 |  | — |  | (96) |  | 55,239
Corporate equity securities | 207 |  | 1689 |  | — |  | 1,896
Commercial paper | 27,933 |  | — |  | (20) |  | 27,913
Agency bonds | 4,991 |  | — |  | (1) |  | 4,990
U.S. Government bonds | 8,939 |  | — |  | (10) |  | 8,929
Municipal bonds | 2,028 |  | — |  | (13) |  | 2,015
| $ | 179,528 |  | $ | 1,695 |  | $ | (182) |  | $ | 181,041
Schedule of Other Current Assets | Other current assets consist of the following (in thousands):
| December 31, |  |
| 2018 |  | 2017
Restricted cash | $ | 2,616 |  | $ | —
Investment in Viking warrants | 9,257 |  | —
Other | 8,545 |  | 1,514
| $ | 20,418 |  | $ | 1,514
Schedule of Property and Equipment | Property and equipment is stated at cost and consists of the following (in thousands):
| December 31, |  |
| 2018 |  | 2017
Lab and office equipment | $ | 4,183 |  | $ | 3,460
Leasehold improvements | 2,418 |  | 1,917
Computer equipment and software | 936 |  | 697
| 7,537 |  | 6,074
Less accumulated depreciation and amortization | (2,165) |  | (1,862)
| $ | 5,372 |  | $ | 4,212
Schedule of Goodwill and Other Identifiable Intangible Assets | Goodwill and identifiable intangible assets consist of the following (in thousands):
| December 31, |  |
| 2018 |  | 2017
Indefinite lived intangible assets |  |  |
IPR&D | $ | — |  | $ | 7,923
Goodwill | 86,646 |  | 85,959
Definite lived intangible assets |  |  |
Complete technology | 235,413 |  | 222,900
Less: Accumulated amortization | (35,070) |  | (23,301)
Trade name | 2,642 |  | 2,642
Less: Accumulated amortization | (1,048) |  | (916)
Customer relationships | 29,600 |  | 29,600
Less: Accumulated amortization | (11,744) |  | (10,264)
Total goodwill and other identifiable intangible assets, net | $ | 306,439 |  | $ | 314,543
Schedule of Accrued Liabilities | Accrued liabilities consist of the following (in thousands):
| December 31, |  |
| 2018 |  | 2017
Compensation | $ | 4,045 |  | $ | 4,085
Legal | 942 |  | 430
Amounts owed to former licensees | 428 |  | 396
Royalties owed to third parties | 1,025 |  | 954
Payments due to broker for share repurchases | 4,613 |  | —
Return reserve | 3,590 |  | —
Restructuring | 1,093 |  | —
Other | 3,464 |  | 1,512
| $ | 19,200 |  | $ | 7,377
Schedule of Contingent Liabilities | The following table summarizes contingent liabilities as of December 2018 and 2017 (in thousands):
| December 31, 2016 | Payments | Fair Value Adjustment |  | Additions | December 31, 2017 | Payments | Fair Value Adjustment | December 31, 2018
Cydex | $ | 6,600 | $ | (5,000) | $ | — |  | $ | — | $ | 1,600 | $ | (25) | $ | (1,050) | $ | 525
Metabasis | $ | 1,500 | $ | — | $ | 2,500 |  | $ | — | $ | 4,000 | $ | (3,900) | $ | 5,400 | $ | 5,500
Crystal | $ | — | $ | — | $ | — |  | $ | 8,400 | $ | 8,400 | $ | (1,000) | $ | (924) | $ | 6,476
Total | $ | 8,100 | $ | (5,000) | $ | 2,500 |  | $ | 8,400 | $ | 14,000 | $ | (4,925) | $ | 3,426 | $ | 12,501

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