6. OTHER LONG-TERM ASSETS

Other long-term assets consisted of the following:

	June 30, 2018		September 30, 2017

Auction rate securities (ARS)	$	3,975	$	5,319
Long-term contract assets		1,809		2,115
Other long-term assets		2,026		2,154
Other long-term investments		1,089		929
Total	$	8,899	$	10,517

Our ARS investment at June 30, 2018 consisted of one tax exempt municipal debt security with a par and fair value of $3,975 which has a maturity greater than ten years. The balance of our ARS investment decreased due to redemption of one of our securities during the quarter. The fair value of our ARS was determined using Level 2 fair value inputs. We have classified our ARS as held-to-maturity security based on our intention and ability to hold the security until maturity. There was no unrecognized gain or loss on our ARS investment during the quarter. Although we believe this security will ultimately be collected in full, we believe that it is not likely that we will be able to monetize the security in our next business cycle (which for us is generally one year). We will continue to monitor our ARS for impairment indicators, which may require us to record an impairment charge that is deemed other-than-temporary.

In the third quarter of fiscal 2015, we amended a supply agreement with an existing supplier. The amended agreement includes a fee of $4,500, of which we already have paid $3,000, which provides us the option to purchase certain raw materials beyond calendar 2016 through the expiration of the agreement in December 2019. This fee was recorded as a long-term asset at its present value and is being amortized into cost of goods sold on a straight-line basis through the expiration date of the agreement. See Note 10 for more information regarding this agreement.

Other long-term assets are comprised of the long-term portion of prepaid unamortized debt costs, related to our Revolving Credit Facility, as well as miscellaneous deposits and prepayments on contracts extending beyond the next twelve months. As discussed in Note 3, we recorded a long-term asset and a corresponding long-term liability of $1,089 representing the fair value of our SERP investments as of June 30, 2018.