Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 163,104	$ 177,993
Short-term restricted cash	149
Accounts receivable, net	70,947	78,727
Inventories, net	134,051	129,000
Prepaid expenses and other current assets	12,161	11,051
Total current assets	380,412	396,771
Property, plant and equipment, net	19,638	41,149
Operating lease assets	7,453
Finance lease assets, net	22,895
Long-term restricted cash	6,715	6,909
Deferred income taxes	71,357	71,939
Other assets	34,985	31,673
Total assets	543,455	548,441
Current liabilities:
Accounts payable	29,641	35,955
Accrued compensation	6,153	19,218
Warranty	4,319	4,819
Income taxes	491	462
Deferred revenue	16,639	19,513
Other current liabilities	8,815	5,030
Total current liabilities	66,058	84,997
Finance lease obligation	48,549
Capital lease obligation		47,757
Long-term deferred revenue	3,842	3,071
Other long-term liabilities	7,853	4,279
Total liabilities	126,302	140,104
Commitments and contingencies (Note 15)
Stockholders' equity:
Common stock, $0.001 par value, 75,000 shares authorized; 32,881 shares issued and outstanding at March 31, 2019; 32,558 shares issued and outstanding at December 31, 2018	33	33
Additional paid-in capital	568,335	565,116
Accumulated deficit	(151,198)	(157,260)
Accumulated other comprehensive income	(17)	448
Total stockholders' equity	417,153	408,337
Total liabilities and stockholders' equity	$ 543,455	$ 548,441