15.  RELATED PARTY TRANSACTIONS

Enovation Controls purchases and sells inventory to entities partially owned by a director of Helios. For the nine months ended September 28, 2019, and September 29, 2018, inventory sales to the entities totaled $1,113 and $2,080, respectively, and inventory purchases from the entities totaled $3,857 and $5,184, respectively.

At September 28, 2019, and December 29, 2018, amounts due from the entities totaled $198 and $296, respectively, and amounts due to the entities totaled $317 and $631, respectively.