Accrued liabilities

3 Months Ended

Mar. 31, 2012

Accrued liabilities [Abstract]

Accrued liabilities

5. Accrued liabilities

Accrued liabilities consisted of the following at March 31, 2012 and December 31, 2011:

	March 31, 2012		December 31, 2011
Accrued expenses	$	2,741,316	$	2,224,398
Accrued salaries and benefits		1,688,202		1,549,659
Accrued litigation judgment expense		1,100,000		3,300,000
Accrued income tax		508,129		141,488
Accrued warranty expense		299,655		427,459
Accrued liabilities	$	6,337,302	$	7,643,004