OTHER ASSETS

Other current assets

Other current assets consisted of the following at June 30, 2018 and December 31, 2017:



(in thousands)	June 30, 2018		December 31, 2017
Prepaid manufacturing costs	$	7,121	$	7,646
Prepaid selling, general and administrative expenses	3,616		2,265
Prepaid research and development expenses	1,405		1,288
Total other current assets	$	12,142	$	11,199

Prepaid manufacturing costs as of June 30, 2018 and December 31, 2017 primarily relate to upfront payments to our contract manufacturers related to 2018 production of inventory.

Other assets, net

Other assets, net consisted of the following at June 30, 2018 and December 31, 2017:



(in thousands)	June 30, 2018		December 31, 2017
Deferred manufacturing costs	$	10,433	$	7,338
Deposits	1,159		1,099
Long-term prepaid manufacturing costs	1,000		1,000
Deferred registration fees	140		140
Total other long-term assets	$	12,732	$	9,577

Deferred manufacturing costs as of June 30, 2018 and December 31, 2017 consisted of amounts paid or payable under contract manufacturing agreements, including a $5.0 million milestone related to a facility construction agreement and $2.4 million and $2.3 million in product premiums payable by us to our contract manufacturer at June 30, 2018 and December 31, 2017, respectively. We capitalize certain expenses as deferred costs related to agreements with contract manufacturers in connection with the facility expansion activities. These costs will be capitalized as incurred and will begin to be expensed at such time that we begin to receive product from the newly-constructed or expanded facilities. These costs will be expensed ratably over the relevant supply periods based on anticipated product to be received from the facilities. At June 30, 2018 and December 31, 2017, zero and $7.3 million, respectively, included in deferred manufacturing costs were also recorded as a liability on our consolidated balance sheets as they had not yet been paid.