CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 98,521	$ 113,009
Marketable securities	48,594	58,742
Accounts receivable, net	65,104	94,163
Inventories	30,388	31,553
Prepaid and other current assets	20,950	19,100
Total current assets	263,557	316,567
Property and equipment, net	3,031	4,116
Goodwill	422,513	422,513
Intangible assets, net	3,946	23,620
Operating lease right-of-use asset	22,007	23,286
Deferred tax assets	0	630
Restricted cash	495	495
Total assets	715,549	791,227
Current liabilities:
Accounts payable	12,944	27,021
Accrued expenses	144,567	183,382
Current portion of operating lease liability	3,488	4,077
Current portion of acquisition-related contingent consideration	0	17
Total current liabilities	160,999	214,497
Long-term liabilities:
Convertible notes, net	285,137	277,034
Long-term operating lease liability	19,263	19,791
Other long-term liabilities	828	89
Total liabilities	466,227	511,411
Commitments and contingencies (Note O)
Stockholders’ equity:
Preferred stock, par value $0.01 per share, 2,000,000 shares authorized; none issued	0	0
Common stock, par value $0.01 per share, 117,500,000 shares authorized; 34,463,373 and 33,999,081 shares issued and outstanding at June 30, 2020 and December 31, 2019, respectively	344	339
Additional paid-in capital	1,303,095	1,297,917
Accumulated other comprehensive loss	(2,964)	(3,239)
Accumulated deficit	(1,051,153)	(1,015,201)
Total stockholders’ equity	249,322	279,816
Total liabilities and stockholders’ equity	$ 715,549	$ 791,227