Accounts Receivable

9 Months Ended

Sep. 30, 2022

Receivables [Abstract]

Accounts Receivable

4. Accounts Receivable

Accounts receivable, net consists of the following (in thousands):

	September 30, 2022			December 31, 2021
Accounts receivable – commercial
Accounts receivable, gross	$	22,971		$	7,939
Wholesaler distribution fees and prompt pay discounts		(2,863	)		(1,696	)
Reserve for returns		(3,135	)		(2,797	)
Total accounts receivable – commercial, net		16,973			3,446
Accounts receivable – collaborations and services
Accounts receivable, gross		6,520			2,060
Allowance for doubtful accounts		—			(767	)
Total accounts receivable – collaborations and services, net		6,520			1,293
Total accounts receivable, net	$	23,493		$	4,739

As of September 30, 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 78% of commercial accounts receivable as of September 30, 2022 and approximately 75% and 73% of gross sales for the three and nine months ended September 30, 2022, respectively. As of December 31, 2021, the Company had three wholesale distributors representing approximately 79% of commercial accounts receivables and approximately 80% of gross sales.

As of September 30, 2022, there was no allowance for credit losses for accounts receivable – collaborations and services. The Company had one collaboration partner, United Therapeutics, that comprised 100% of the collaboration and services net accounts receivable as of September 30, 2022 and approximately 100% and 96% of gross revenue from collaborations and services for the three and nine months ended September 30, 2022, respectively.