6. Satellite Network and Other Equipment

Satellite network and other equipment consisted of the following:


	Useful life		March 31,			December 31,
	(years)		2014			2013
Land			$	381			381
Satellite network		1-10		29,814			29,362
Capitalized software		3-7		4,989			4,563
Computer hardware		3		2,486			2,419
Other		2-7		2,370			2,125
Assets under construction				122,469			118,806

				162,509			157,656
Less: accumulated depreciation and amortization				(25,965	)		(24,628	)

			$	136,544		$	133,028

During the three months ended March 31, 2014 and 2013, the Company capitalized costs attributable to the design and development of internal-use software in the amount of $628 and $337, respectively.

Depreciation and amortization expense for the three months ended March 31, 2014 and 2013 was $1,337 and $1,002, respectively. This includes amortization of internal-use software of $186 and $109 for the three months ended March 31, 2014 and 2013, respectively.

Assets under construction primarily consist of milestone payments pursuant to procurement agreements which includes, the design, development, launch and other direct costs relating to the construction of the next-generation satellites (See Note 15) and upgrades to its infrastructure and ground segment.