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


	September 30, 2026			December 31, 2025
Accounts receivable – commercial
Accounts receivable, gross	$	38,544		$	44,274
Wholesaler distribution fees and prompt pay discounts		(2,549	)		(3,332	)
Reserve for returns		(10,263	)		(10,208	)
Allowance for credit losses		—			(61	)
Total accounts receivable – commercial, net		25,732			30,673
Accounts receivable – collaborations and services		15,302			7,694
Total accounts receivable, net	$	41,034		$	38,367

As of September 30, 2026, there was no allowance for credit losses for commercial accounts receivable or credit losses for collaborations and services accounts receivable. As of September 30, 2026 and December 31, 2025, the Company's three customers representing the largest individual accounts receivable balances accounted for approximately 68% and 68% of commercial accounts receivable, respectively. As of September 30, 2026 and December 31, 2025, the Company's collaboration partner, UT, accounted for 97% and 94%, respectively, of the collaborations and services accounts receivable.

UT accounted for approximately 56% and 60% of consolidated revenues for the three and nine months ended September 30, 2026, respectively, and 72% for both the three and nine months ended September 30, 2025. For the three and nine months ended September 30, 2026, one single commercial customer accounted for 23% and 15%, respectively, of the Company's consolidated revenues. For the three months ended September 30, 2025, two other commercial customers accounted for approximately 12% and 10% of the Company's consolidated revenues, respectively. For the nine months ended September 30, 2025, those two commercial customers each accounted for approximately 11% of the Company’s consolidated revenues.