Accounts Receivable

3 Months Ended

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.