INTANGIBLE AND OTHER NON-CURRENT ASSETS

Intangibles and other non-current assets at December 31, 2018 and June 30, 2019 are as follows (in thousands):



	December 31, 2018		June 30, 2019
Prepaid agreements not-to-compete, net of accumulated amortization of $6,672 and $7,008, respectively	$	4,048	$	3,794
Tradenames	17,635		17,635
Capitalized commissions on preneed contracts, net of accumulated amortization of $569 and $846, respectively	2,717		2,754
Other	25		177
Intangible and other non-current assets, net	$	24,425	$	24,360

Prepaid agreements not-to-compete are amortized over the term of the respective agreements, ranging generally from one to ten years. Amortization expense for our prepaid agreements not-to-compete was approximately $153,000 and $168,000 for the three months ended June 30, 2018 and 2019, respectively and $292,000 and $336,000 for the six months ended June 30, 2018 and 2019, respectively.

Our tradenames have indefinite lives and therefore are not amortized.

We capitalize sales commissions and other direct selling costs related to preneed cemetery merchandise and services and preneed funeral trust contracts as these costs are incremental and recoverable costs of obtaining a contract with a customer. Our capitalized commissions on preneed contracts are amortized on a straight-line basis over the average maturity period for our preneed cemetery merchandise and services contracts and preneed funeral trust contracts, of eight and ten years, respectively. Amortization expense totaled approximately $144,000 and $139,000 for the three months ended June 30, 2018 and 2019, respectively and $293,000 and $277,000 for the six months ended June 30, 2018 and 2019, respectively.