Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 196,429	$ 279,736
Restricted cash	838	847
Short-term investments	65,023	47,780
Accounts receivable, net	133,750	98,866
Contract assets	4,931	160
Inventories	145,939	120,266
Deferred cost of sales	205	15,994
Prepaid expenses and other current assets	28,580	33,437
Total current assets	575,695	597,086
Property, plant, and equipment, net	79,268	85,058
Intangible assets, net	93,582	369,843
Goodwill	307,131	307,131
Deferred income taxes	2,172	3,047
Other assets	30,261	25,310
Total assets	1,088,109	1,387,475
Current liabilities:
Accounts payable	65,090	50,318
Accrued expenses and other current liabilities	55,274	58,068
Customer deposits and deferred revenue	73,459	112,032
Income taxes payable	1,782	3,846
Total current liabilities	195,605	224,264
Deferred income taxes	7,784	36,845
Long-term debt	281,401	275,630
Other liabilities	9,389	10,643
Total liabilities	494,179	547,382
Stockholders' equity:
Preferred stock, $0.01 par value; 500,000 shares authorized; no shares issued and outstanding
Common stock, $0.01 par value; 120,000,000 shares authorized; 48,734,582 and 48,229,251 shares issued at June 30, 2018 and December 31, 2017, respectively; 48,734,582 and 48,144,416 shares outstanding at June 30, 2018 and December 31, 2017, respectively.	487	482
Additional paid-in capital	1,057,962	1,051,953
Accumulated deficit	(466,331)	(212,870)
Accumulated other comprehensive income	1,812	1,812
Treasury stock, at cost, 84,835 shares at December 31, 2017.		(1,284)
Total stockholders' equity	593,930	840,093
Total liabilities and stockholders' equity	$ 1,088,109	$ 1,387,475