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Note 5 - Revenue Recognition - Adoption of Topic 606 (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jan. 01, 2018 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Inventory | $ 9,910 | $ 39,032 |  |  |  | $ 10,108 |  |  |  | $ 39,032 | $ 10,108 |
Other accrued liabilities | 18,166 | 32,715 |  |  |  | 17,175 |  |  |  | 32,715 | 17,175 |
Deferred revenue |  |  |  |  |  | 2,763 |  |  |  |  | 2,763 |
Accumulated deficit | (781,881) | (960,721) |  |  |  | (783,455) |  |  |  | (960,721) | (783,455) |
Other accrued liabilities | 18,166 | 32,715 |  |  |  | 17,175 |  |  |  | 32,715 | 17,175 |
Accumulated deficit | (781,881) | (960,721) |  |  |  | (783,455) |  |  |  | (960,721) | (783,455) |
Net product sales |  | 28,844 | $ 19,786 | $ 17,277 | $ 11,567 | 10,053 | $ 8,572 | $ 8,510 | $ 3,632 | 77,474 | 30,767 | $ 1,279
Cost of product sales |  | 11,572 | 7,576 | 5,231 | 3,133 | 1,338 | 1,051 | 1,013 | 1,186 | 27,512 | 4,588 | 35
Loss from operations |  |  |  |  |  |  |  |  |  | (183,937) | (194,558) | (170,915)
Net loss |  | $ (49,559) | $ (38,346) | $ (38,670) | $ (52,265) | $ (62,490) | $ (41,866) | $ (42,799) | $ (50,329) | $ (178,840) | $ (197,484) | $ (173,143)
Basic and diluted net loss per share (in dollars per share) |  | $ (0.63) | $ (0.49) | $ (0.54) | $ (0.81) | $ (1.09) | $ (0.77) | $ (0.80) | $ (1) | $ (2.44) | $ (3.65) | $ (4.56)
Inventory |  |  |  |  |  |  |  |  |  | $ (29,122) | $ (4,768) | $ (5,340)
Other accrued liabilities |  |  |  |  |  |  |  |  |  | 14,941 | 11,482 | 2,482
Deferred revenue |  |  |  |  |  |  |  |  |  |  | $ 1,664 | $ 1,099
Calculated under Revenue Guidance in Effect before Topic 606 [Member] |  |  |  |  |  |  |  |  |  |  |  |
Inventory |  | $ 41,213 |  |  |  |  |  |  |  | 41,213 |  |
Other accrued liabilities |  | 25,520 |  |  |  |  |  |  |  | 25,520 |  |
Deferred revenue |  | 14,010 |  |  |  |  |  |  |  | 14,010 |  |
Accumulated deficit |  | (965,355) |  |  |  |  |  |  |  | (965,355) |  |
Other accrued liabilities |  | 25,520 |  |  |  |  |  |  |  | 25,520 |  |
Accumulated deficit |  | (965,355) |  |  |  |  |  |  |  | (965,355) |  |
Net product sales |  |  |  |  |  |  |  |  |  | 72,431 |  |
Cost of product sales |  |  |  |  |  |  |  |  |  | 25,529 |  |
Loss from operations |  |  |  |  |  |  |  |  |  | (186,997) |  |
Net loss |  |  |  |  |  |  |  |  |  | $ (181,900) |  |
Basic and diluted net loss per share (in dollars per share) |  |  |  |  |  |  |  |  |  | $ (2.49) |  |
Inventory |  |  |  |  |  |  |  |  |  | $ (31,105) |  |
Other accrued liabilities |  |  |  |  |  |  |  |  |  | 8,737 |  |
Deferred revenue |  |  |  |  |  |  |  |  |  | 11,247 |  |
Accounting Standards Update 2014-09 [Member] |  |  |  |  |  |  |  |  |  |  |  |
Inventory | (198) |  |  |  |  |  |  |  |  |  |  |
Other accrued liabilities | 991 |  |  |  |  |  |  |  |  |  |  |
Deferred revenue | (2,763) |  |  |  |  |  |  |  |  |  |  |
Accumulated deficit | 1,574 |  |  |  |  |  |  |  |  |  |  |
Other accrued liabilities | 991 |  |  |  |  |  |  |  |  |  |  |
Accumulated deficit | 1,574 |  |  |  |  |  |  |  |  |  |  |
Net product sales | 2,900 |  |  |  |  |  |  |  |  |  |  |
Cost of product sales | $ 200 |  |  |  |  |  |  |  |  |  |  |
Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member] |  |  |  |  |  |  |  |  |  |  |  |
Inventory |  | 2,181 |  |  |  |  |  |  |  | 2,181 |  |
Other accrued liabilities |  | (7,195) |  |  |  |  |  |  |  | (7,195) |  |
Deferred revenue |  | 14,010 |  |  |  |  |  |  |  | 14,010 |  |
Accumulated deficit |  | (4,634) |  |  |  |  |  |  |  | (4,634) |  |
Other accrued liabilities |  | (7,195) |  |  |  |  |  |  |  | (7,195) |  |
Accumulated deficit |  | $ (4,634) |  |  |  |  |  |  |  | (4,634) |  |
Net product sales |  |  |  |  |  |  |  |  |  | (5,043) |  |
Cost of product sales |  |  |  |  |  |  |  |  |  | (1,983) |  |
Loss from operations |  |  |  |  |  |  |  |  |  | (3,060) |  |
Net loss |  |  |  |  |  |  |  |  |  | $ (3,060) |  |
Basic and diluted net loss per share (in dollars per share) |  |  |  |  |  |  |  |  |  | $ (0.05) |  |
Inventory |  |  |  |  |  |  |  |  |  | $ (1,983) |  |
Other accrued liabilities |  |  |  |  |  |  |  |  |  | (6,204) |  |
Deferred revenue |  |  |  |  |  |  |  |  |  | $ 11,247 |  |

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