Accounts Payable and Accrued Liabilities (Tables)

12 Months Ended

Dec. 31, 2013

Payables and Accruals [Abstract]

Schedule of accounts payable and accrued liabilities

Accounts payable and accrued liabilities consisted of the following (in thousands): 

	December 31, 2013		December 31, 2012
Accrued expenses	$	14,162	$	4,084
Accounts payable	2,118		1,179
Accrued payroll liabilities	1,766		703
Warranty reserves (Note 2)	608		141
	$	18,654	$	6,107