Accrued liabilities

6 Months Ended

Jun. 30, 2011

Accrued liabilities [Abstract]

Accrued liabilities

5. Accrued liabilities

Accrued liabilities consisted of the following at June 30, 2011 and December 31, 2010:

	June 30, 2011		December 31, 2010
Accrued salaries and benefits	$	1,620,218	$	1,411,716
Accrued litigation judgment expense		3,300,000		—
Accrued expenses		1,352,998		1,668,477
Accrued warranty expense		330,088		646,113
Accrued income tax		—		33,494
	$	6,603,304	$	3,759,800