5.	COMMITMENTS

Rent expense for the years ended December 31, 2017 and 2016, was $74,000 and $69,000, respectively.

In 2007, the Company entered into a lease for 17,000 square feet of space in a Tempe, Arizona office and research facility. The term of this lease was sixty months from March 1, 2008. In January of 2013, this lease was amended to extend the lease to February 28, 2015, with the rentable square feet of space reduced to 2,845 square feet and monthly rental payments of approximately $4,400 plus a proportionate share of building operating expenses and property taxes. This lease has been extended to February 28, 2020. Effective March 1, 2018 the rentable square feet of space is reduced to 1,379 square feet, with monthly rental payments of approximately $2,500 plus a proportionate share of building operating expenses and property taxes.