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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2021
Accounting Policies [Abstract] |
Schedule of Reconciliation of Cash, Cash Equivalents, and Restricted Cash | The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported on the consolidated balance sheets that sum to amounts reported on the consolidated statement of cash flows (in thousands):
|  | December 31, |
|  | 2021 |  |  | 2020 |
Cash and cash equivalents |  | $ | 124,184 |  |  | $ | 67,005 |
Restricted cash |  |  | — |  |  |  | 158 |
Total cash, cash equivalents, and restricted cash |  | $ | 124,184 |  |  | $ | 67,163 |
Schedule of Contractual Maturities of Held to Maturity Investments | The contractual maturities of our held to maturity investments as of December 31, 2021 and 2020 are summarized below (in thousands):
|  | December 31, 2021 |  |  | December 31, 2020 |
|  | Amortized Cost Basis |  |  | Aggregate Fair Value |  |  | Amortized Cost Basis |  |  | Aggregate Fair Value |
Due in one year or less(1) |  | $ | 103,733 |  |  | $ | 103,669 |  |  | $ | 59,495 |  |  | $ | 59,495 |
Due after one year through five years |  |  | 56,619 |  |  |  | 56,433 |  |  |  | — |  |  |  | — |
Total |  | $ | 160,352 |  |  | $ | 160,102 |  |  | $ | 59,495 |  |  | $ | 59,495 |
____________________________
(1) | The investments due in one year or less include cash equivalents of $23.8 million as of December 31, 2021 and $59.5 million as of December 31, 2020.
Schedule of Accounts Receivable, Net | Accounts receivable, net consists of the following (in thousands):
|  | December 31, |
|  | 2021 |  |  | 2020 |
Accounts receivable – commercial |  |  |  |  |  |  |  |
Accounts receivable, gross |  | $ | 7,939 |  |  | $ | 8,090 |
Wholesaler distribution fees and prompt pay discounts |  |  | (1,696 | ) |  |  | (1,205 | )
Reserve for returns |  |  | (2,797 | ) |  |  | (2,667 | )
Total accounts receivable – commercial, net |  |  | 3,446 |  |  |  | 4,218 |
Accounts receivable – collaborations and services |  |  |  |  |  |  |  |
Accounts receivable, gross |  |  | 2,060 |  |  |  | — |
Allowance for credit losses |  |  | (767 | ) |  |  | — |
Total accounts receivable – collaborations and services, net |  |  | 1,293 |  |  |  | 4,218 |
Accounts receivable – other |  |  | 255 |  |  |  | — |
Total accounts receivable, net |  | $ | 4,994 |  |  | $ | 4,218 |

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