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Sale of Assets
12 Months Ended
Dec. 31, 2018
Discontinued Operations And Disposal Groups [Abstract]  
Sale of Assets

9. Sale of Assets

On May 5, 2017, the Company entered into an agreement to sell certain inventory and intellectual property to a third party for $1.0 million in consideration, payable via a credit to future minimum royalties owed to the third party under an existing exclusive license agreement between the parties.  The Company recorded a net gain on sale of assets of $0.9 million which is included under operating expenses on the Company’s consolidated statement of operations.