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Disposition of the Hospital Business - Unaudited Pro Forma Condensed Combined Statement of Income (Loss) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |
Product sales | $ 22,334 | $ 59,215 | $ 103,269
Total operating expense | 16,519 | 83,327 | 208,195
Operating income (loss) | 5,815 | (24,112) | (104,926)
Loss before income taxes | (5,082) | (38,582) | (113,197)
Cost of products | 5,742 | 12,125 | 17,516
Research and development expenses | 20,442 | 32,917 | 39,329
Selling, general and administrative expenses | 32,405 | 30,183 | 100,359
Intangible asset amortization | 406 | 816 | 6,619
Changes in fair value of contingent consideration | 3,327 | 845 | (22,731)
Other expense - changes in fair value of contingent consideration payable | 435 | 378 | $ (1,899)
Pro Forma |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |
Product sales | 159 | (58) |
Total operating expense | 8,127 | 67,235 |
Operating income (loss) | (7,968) | (67,293) |
Loss before income taxes | (18,430) | (81,385) |
As Reported |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |
Product sales | 22,334 | 59,215 |
Total operating expense | 16,519 | 83,327 |
Operating income (loss) | 5,815 | (24,112) |
Loss before income taxes | (5,082) | (38,582) |
Pro Forma Adjustments | Pro Forma |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |
Product sales | (22,175) | (59,273) |
Total operating expense | (8,392) | (16,092) |
Operating income (loss) | (13,783) | (43,181) |
Loss before income taxes | (13,348) | (42,803) |
Pro Forma Adjustments | Pro Forma | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |
Cost of products | 3,540 | 11,368 |
Research and development expenses | 322 | 1,960 |
Selling, general and administrative expenses | 797 | 1,102 |
Intangible asset amortization | 406 | 816 |
Changes in fair value of contingent consideration | 3,327 | 845 |
Other expense - changes in fair value of contingent consideration payable | $ 435 | $ 378 |

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