Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 113,889	$ 70,791
Accounts receivable, net	69,835	50,573
Inventories, net	123,441	113,853
Prepaid expenses and other current assets	7,466	5,512
Total current assets	314,631	240,729
Property, plant and equipment, net	35,704	30,840
Long-term restricted cash	6,799	6,864
Other assets	25,971	23,798
Total assets	383,105	302,231
Current liabilities:
Accounts payable	33,594	24,996
Accrued compensation	15,829	5,142
Warranty	4,154	2,426
Income taxes	285	240
Deferred revenue	14,447	10,335
Other current liabilities	5,388	4,592
Total current liabilities	73,697	47,731
Sale leaseback obligation	47,704	47,586
Long-term deferred revenue	1,985	674
Other long-term liabilities	5,317	4,785
Total liabilities	128,703	100,776
Commitments and contingencies (Note 12)
Stockholders' equity:
Preferred stock, $0.001 par value, 30,000 shares authorized; none issued or outstanding
Common stock, $0.001 par value, 75,000 shares authorized; 31,433 shares issued and outstanding at September 30, 2017; 29,518 shares issued and outstanding at December 31, 2016	31	30
Additional paid-in capital	550,058	535,408
Accumulated deficit	(296,425)	(331,704)
Accumulated other comprehensive income (loss)	738	(2,279)
Total stockholders' equity	254,402	201,455
Total liabilities and stockholders' equity	$ 383,105	$ 302,231