3. Inventories, net

Inventories consisted of the following (in thousands):

Finished goods included consigned inventory totaling approximately $1.7 million and $0.5 million as of June 30, 2018 and December 31, 2017. As of June 30, 2018, inventories totaling $1.2 million and $1.2 million were classified as current and long-term, respectively. Inventories classified as current represent the carrying value of inventories as of June 30, 2018, that management estimates will be sold by June 30, 2019.