Other Assets

Other assets consist of the following:

December 31,	2012			2011

Patents, at cost	$	5,021		$	4,900
Accumulated amortization		(2,826	)		(2,583	)
Deposits on capital items		3,934			1,618
Software development costs, at cost		2,057			2,057
Accumulated amortization		(498	)		(146	)
Investment in equity securities, carried at cost		125			969
Investment in equity securities, equity method		1,206			-
Other		549			474
	$	9,568		$	7,289

The capitalized cost of patents is amortized using the straight-line method over their useful lives. The cost of patent amortization was $0.2 million in each 2012, 2011, and 2010. The estimated annual patent amortization cost for each of the next five years is $0.2 million. Costs incurred to maintain existing patents are charged to expense in the year incurred.

Software development costs were incurred to develop and implement an integrated ERP system prior to the time the system became operational. These costs are being amortized using the straight line method over a period of sixty months. Costs incurred subsequent to the system becoming operational are being expensed. The cost of software development cost amortization was $0.4 million and $0.1 million in 2012 and 2011, respectively. There was no amortization for software development costs in 2010.

The investment in equity securities carried at cost was evaluated for impairment as of December 31, 2012 and it was determined that the investment has been impaired and that the impairment is other than temporary. As a result, the Company recognized an impairment loss of $1.1 million in 2012.

The investment in equity securities accounted for on the equity method of accounting consists of a 29% interest in a crossbow manufacturer. The Company recognized an immaterial loss related to this investment in 2012 and did not receive any dividends from this investment in 2012.