Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 28,452	$ 42,032
Accounts receivable, net of allowances of $1,808 and $569 at December 31, 2015 and 2014, respectively	46,099	45,119
Inventory	40,800	21,590
Prepaid expenses and other	6,417	6,155
Total current assets	121,768	114,896
Property and equipment, net	32,118	30,824
Goodwill	3,745	3,745
Intangibles, net	2,220	1,811
Other assets	5,677	916
Total assets	165,528	152,192
Current liabilities:
Accounts payable	25,569	22,316
Accrued liabilities	19,292	26,036
Deferred revenues	3,915	2,747
Warranty obligations, current portion (includes $2,601 and $1,125 measured at fair value at December 31, 2015 and 2014, respectively)	7,072	7,607
Borrowings under revolving credit facility	17,000	0
Total current liabilities	72,848	58,706
Deferred revenues, non-current	25,115	16,612
Warranty obligations, non-current (includes $3,581 and $2,437 measured at fair value at December 31, 2015 and 2014, respectively)	23,475	26,333
Other non-current liabilities	2,641	3,589
Total liabilities	$ 124,079	$ 105,240
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $0.00001 par value, 10,000 shares authorized; none issued and outstanding	$ 0	$ 0
Common stock, $0.00001 par value, 100,000 shares authorized; 45,821 and 43,756 shares issued and outstanding at December 31, 2015 and 2014, respectively	0	0
Additional paid-in capital	224,732	208,022
Accumulated deficit	(183,073)	(160,991)
Accumulated other comprehensive loss	(210)	(79)
Total stockholders’ equity	41,449	46,952
Total liabilities and stockholders’ equity	$ 165,528	$ 152,192