Schedule II- Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2012

Valuation and Qualifying Accounts [Abstract]

VALUATION AND QUALIFYING ACCOUNTS

SCHEDULE II – VALUATION AND QUALIFYING ACCOUNTS

	Balance at		Charged to			Charged to						Balance at
	Beginning		Costs and			Other						End of
Description	of Period		Expenses			Accounts			Deductions			Period
Allowance for doubtful accounts:
Year ended December 31, 2012	$	450,000	$	(242,230	)	$	—			(7,770	)	$	200,000
Year ended December 31, 2011		200,000		296,366			—			(46,366	)		450,000
Year ended December 31, 2010		200,000		48,903			—			(48,903	)		200,000
Allowance for excess and obsolete inventory:
Year ended December 31, 2012	$	4,430,872	$	553,701		$	—		$	(2,664,951	)	$	2,319,622
Year ended December 31, 2011		350,664		4,610,197			—			(529,989	)		4,430,872
Year ended December 31, 2010		474,074		1,278,284			(129,900	)		(1,271,794	)		350,664
Warranty reserve:
Year ended December 31, 2012	$	427,459	$	526,563		$	—		$	(470,301	)	$	483,721
Year ended December 31, 2011		646,113		309,779			—			(528,433	)		427,459
Year ended December 31, 2010		369,311		843,268			—			(566,466	)		646,113