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Accounts Receivable | 3 Months Ended
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Mar. 31, 2022
Receivables [Abstract] |
Accounts Receivable | 3. Accounts Receivable Accounts receivable, net consists of the following (in thousands):
|  | March 31, 2022 |  |  | December 31, 2021 |
Accounts receivable – commercial |  |  |  |  |  |  |  |
Accounts receivable, gross |  | $ | 8,656 |  |  | $ | 7,939 |
Wholesaler distribution fees and prompt pay discounts |  |  | (1,201 | ) |  |  | (1,696 | )
Reserve for returns |  |  | (3,089 | ) |  |  | (2,797 | )
Total accounts receivable – commercial, net |  |  | 4,366 |  |  |  | 3,446 |
Accounts receivable – collaborations and services |  |  |  |  |  |  |  |
Accounts receivable, gross |  |  | 6,224 |  |  |  | 2,060 |
Allowance for doubtful accounts |  |  | (767 | ) |  |  | (767 | )
Total accounts receivable – collaborations and services, net |  |  | 5,457 |  |  |  | 1,293 |
Total accounts receivable, net |  | $ | 9,823 |  |  | $ | 4,739 |
As of March 31, 2022 and December 31, 2021, the allowance for doubtful accounts for accounts receivable – commercial was de minimis. The Company had three wholesale distributors representing approximately 74% of commercial accounts receivable as of March 31, 2022 and approximately 69% of gross sales for the three months ended March 31, 2022. As of March 31, 2022, the allowance for credit losses for accounts receivable – collaborations and services of $0.8 million was related to $0.8 million of accounts receivable for Vertice Pharma for the co-promotion of Thyquidity. The Company had one collaboration partner, United Therapeutics, that comprised 100% of the collaboration and services net accounts receivable as of March 31, 2022 and approximately 94% of gross revenue from collaborations and services for the three months ended March 31, 2022.

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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 http://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 http://asc.fasb.org/subtopic&trid=2196816 + Details
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