CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 31,654	$ 57,019
Marketable securities	83,863	110,953
Accounts receivable, net	19,370	4,861
Inventory	185	791
Prepaid expenses and other current assets	2,822	5,875
Total current assets	137,894	179,499
Property and equipment, net	4,241	4,280
Intangible assets	69,781	72,951
Goodwill		18,504
Other assets	5,323	332
Total assets	217,239	275,566
Current liabilities:
Accounts payable	14,160	14,755
Accrued expenses	27,597	11,986
Current portion of lease liabilities	991	601
Total current liabilities	42,748	27,342
Other liabilities	5,120	1,703
Long-term debt	29,924	29,914
Contingent consideration	1,668	934
Deferred tax liability	549	549
Total liabilities	80,009	60,442
Stockholders' Equity:
Preferred stock, $0.00001 par value; 10,000,000 shares authorized and no shares issued or outstanding at June 30, 2019 and December 31, 2018
Common stock, $0.00001 par value; 100,000,000 shares authorized at June 30, 2019 and December 31, 2018; 41,278,570 and 41,210,725 shares issued and outstanding at June 30, 2019 and December 31, 2018, respectively
Additional paid-in capital	516,836	507,366
Accumulated other comprehensive loss	8	(69)
Accumulated deficit	(379,614)	(292,173)
Total stockholders’ equity	137,230	215,124
Total liabilities and stockholders’ equity	$ 217,239	$ 275,566