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Accounts Receivable | 3 Months Ended
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Mar. 31, 2023
Receivables [Abstract] |
Accounts Receivable | 4. Accounts Receivable Accounts receivable, net consists of the following (in thousands):
|  | March 31, 2023 |  |  | December 31, 2022 |
Accounts receivable – commercial |  |  |  |  |  |
Accounts receivable, gross |  | $ | 18,405 |  |  | $ | 19,359 |
Wholesaler distribution fees and prompt pay discounts |  |  | (2,338 | ) |  |  | (2,536 | )
Reserve for returns |  |  | (4,111 | ) |  |  | (4,108 | )
Total accounts receivable – commercial, net |  |  | 11,956 |  |  |  | 12,715 |
Accounts receivable – collaborations and services |  |  | 7,758 |  |  |  | 4,086 |
Total accounts receivable, net |  | $ | 19,714 |  |  | $ | 16,801 |
As of March 31, 2023 and December 31, 2022, the allowance for doubtful accounts for commercial accounts receivable was de minimis. The Company had three wholesale distributors representing approximately 57% of commercial accounts receivable as of March 31, 2023 and approximately 72% of gross sales for the three months ended March 31, 2023. As of December 31, 2022, the Company had three wholesale distributors representing approximately 79% of commercial accounts receivables. As of March 31, 2023 and December 31, 2022, there was no allowances for credit losses for accounts receivable for collaborations and services. The Company had one collaboration partner, United Therapeutics, that comprised 100% of the collaboration and services net accounts receivable as of March 31, 2023 and December 31, 2022 and approximately 100% of gross revenue from collaborations and services for the three months ended March 31, 2023.

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- Definition The entire disclosure for financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -URI https://asc.fasb.org/subtopic&trid=2196772 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 20 -URI https://asc.fasb.org/subtopic&trid=2196816 + Details
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