Deferred Revenue

3 Months Ended

Mar. 31, 2020

Change in Contract with Customer, Liability [Abstract]

Deferred Revenue from Contract with Customers

10. DEFERRED REVENUE

Deferred revenue relates to a prepayment for future royalties on sales of SPEDRA. In the three months ended March 31, 2020 and 2019, the Company recorded $0.2 million and $0.3 million, respectively, of revenues which had been deferred as of December 31, 2019 and 2018, respectively. These amounts were applied against the prepayment for future royalties.