Accrued Liabilities (Tables)

12 Months Ended

Dec. 31, 2012

Accrued Liabilities [Abstract ]

Accrued liabilities

At December 31, 2012 and 2011, accrued liabilities consisted of the following:

At December 31,	2012		2011
Payroll and employee benefits	$	2,519,944	$	7,098,276
Royalties		2,071,142		1,739,681
Commissions		1,757,075		1,180,298
Warranties		985,572		785,412
Taxes		644,997		589,862
Professional fees		618,026		732,351
Other		505,788		312,041
Total	$	9,102,544	$	12,437,921